inebriety
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C2 noun /ˌɪn.ɪˈbraɪ.ə.ti/

inebriety

embriaguez
Meaning
the state of being drunk or intoxicated
Example
His frequent inebriety led to the loss of his job.
Su frecuente embriaguez le llevó a perder su trabajo.
C2 noun /ˌɪmprəˈpraɪəti/

impropriety

improiedad
Meaning
Failure to observe standards of honesty or modesty; improper behavior.
Example
The politician was accused of financial impropriety.
El político fue acusado de impropiedad financiera.
C2 adjective /ɪˈnɪm.ɪ.tə.bəl/

inimitable

inimitable
Meaning
So good or unusual as to be impossible to copy; unique.
Example
His inimitable writing style made him a literary legend.
Su estilo de escritura inimitable lo convirtió en una leyenda literaria.
C2 verb /ɪmˈpjuːt/

impute

imputar
Meaning
to attribute a fault or responsibility to someone
Example
They imputed the company's success to good leadership.
Ellos imputaron el éxito de la empresa a un buen liderazgo.
C2 noun /ˌɪmprɪˈkeɪʃən/

imprecation

maldición
Meaning
A spoken curse or expression of strong condemnation.
Example
The angry crowd hurled imprecations at the corrupt official.
La multitud enojada lanzó maldiciones al funcionario corrupto.
C2 verb /ˌɪntərˈmɪt/

intermit

interrumpir
Meaning
To suspend or stop for a time; to pause intermittently.
Example
The rain would intermit and then start again.
La lluvia se interrumpiría y luego comenzaría de nuevo.
C2 noun /ˌɪnkənˈɡruːəti/

incongruity

incongruencia
Meaning
The state of being inconsistent or out of place.
Example
The incongruity of his cheerful mood during the funeral shocked everyone.
La incongruencia de su estado de ánimo alegre durante el funeral sorprendió a todos.
C2 noun /ɪmˌprɒb.əˈbɪl.ə.ti/

Improbability

improbabilidad
Meaning
the quality or state of being improbable; unlikely to be true or to happen
Example
The improbability of winning the lottery twice didn't stop her from buying tickets.
La improbabilidad de ganar la lotería dos veces no la detuvo de comprar boletos.
C2 adjective /ˌɪndɪˈtɜːrmənət/

indeterminate

indeterminado
Meaning
Not exactly known, defined, or established; vague or uncertain.
Example
The project was delayed for an indeterminate amount of time.
El proyecto se retrasó por un tiempo indeterminado.
C2 noun /ɪnˈtɛnʃən/

intension

contenido interno
Meaning
The internal content of a concept; the set of attributes implied by a word or phrase.
Example
The intension of the word 'dog' includes being a mammal and domesticated.
La intensión de la palabra 'perro' incluye ser un mamífero y ser domesticado.
C2 noun /ˈɪkθiəˌsɔːrz/

ichthyosaurs

ictiosaurios (un tipo de reptil marino extinto)
Meaning
Extinct marine reptiles that resembled fish and dolphins, dominant during the Mesozoic era.
Example
Ichthyosaurs were swift predators of the ancient seas.
Los ictiosaurios eran depredadores rápidos de los mares antiguos.
C2 adjective /ɪnˈeɪliənəbl/

inalienable

inalienable
Meaning
Unable to be taken away or transferred; absolute and permanent.
Example
Freedom of speech is an inalienable right.
La libertad de expresión es un derecho inalienable.
C2 adverb /ˌɪnsəʊˈmʌtʃ/

insomuch

tanto
Meaning
to such an extent
Example
He was insomuch tired that he could hardly stand.
Estaba tan cansado que apenas podía mantenerse en pie.
C2 adjective ɪˈnɛfəbl

ineffable

inefable
Meaning
Too great or extreme to be expressed or described in words.
Example
The beauty of the landscape was ineffable.
La belleza del paisaje era inefable.
C2 noun /ˈaɪ.ərn.wʊd/

Ironwood

madera de hierro
Meaning
a hard, dense wood from various trees; also the tree itself that produces small flowers
Example
The ironwood tree blooms with tiny white flowers.
El árbol de madera de hierro florece con pequeñas flores blancas.
C2 adjective /ɪmˈpɑːlɪtɪk/

impolitic

imprudente
Meaning
Unwise or imprudent; not showing good judgment.
Example
It would be impolitic to criticize them openly.
Sería imprudente criticarlos abiertamente.
C2 adjective /ˌɪnæprɪˈhɛnsəbl/

inapprehensible

incomprensible
Meaning
not understandable; incomprehensible
Example
The concept was so abstract that it seemed inapprehensible to most students.
El concepto era tan abstracto que parecía incomprensible para la mayoría de los estudiantes.
C2 noun /ɪnˈtɛstəsi/

intestacy

muerte sin testamento
Meaning
The condition of dying without having made a valid will.
Example
His estate was divided according to the laws of intestacy.
Su patrimonio fue dividido según las leyes de la intestacia.
C2 verb /ˈɪməleɪt/

immolate

inmolar
Meaning
To kill or sacrifice, especially by burning.
Example
The protesters threatened to immolate themselves in front of the building.
Los manifestantes amenazaron con inmolarse frente al edificio.
C2 verb /aɪˈtɪnəˌreɪt/

itinerate

itinerar
Meaning
To travel from place to place, usually for the purpose of work or preaching.
Example
The missionary itinerated throughout the region to spread the message.
El misionero viajó por toda la región para difundir el mensaje.
C2 adjective /ɪmˈpælpəbəl/

impalpable

intangible
Meaning
unable to be felt by touch; difficult to grasp or understand
Example
There was an impalpable sense of fear in the room.
Había una sensación intangible de miedo en la habitación.
C2 noun /ɪnˈɛrənsi/

inerrancy

inerrancia
Meaning
the belief or quality of being free from error; absolute correctness
Example
Some religious groups strongly affirm the inerrancy of their sacred texts.
Algunos grupos religiosos afirman fuertemente la inerrancia de sus textos sagrados.
C2 verb /ɪnˈdaɪt/

indite

componer
Meaning
To write or compose (literary or formal works).
Example
The poet indited a heartfelt sonnet.
El poeta compuso un soneto sincero.
C2 verb /ˈɪmprɛɡneɪt/

impregnate

embarazar / impregnar
Meaning
To make pregnant; to fill or saturate with something.
Example
The scientist used a method to impregnate the material with resin.
El científico utilizó un método para impregnar el material con resina.
C2 adjective /ɪmˈpruːdənt/

imprudent

imprudente
Meaning
Not showing care for the consequences of an action.
Example
It was imprudent to drive in such stormy weather.
Era imprudente conducir en un clima tan tormentoso.
C2 adjective /ɪˈmɒdɪst/

immodest

presuntuoso / indecente
Meaning
lacking humility or decency; excessively proud or improper
Example
His immodest remarks offended the audience.
Sus comentarios presuntuosos ofendieron a la audiencia.
C2 adjective ˌɪm.pəˈtɜː.bə.bəl

imperturbable

imperturbable
Meaning
Unable to be upset or excited; not easily disturbed.
Example
His imperturbable nature made him a great leader.
Su naturaleza imperturbable lo convirtió en un gran líder.
C2 adjective /ɪnˈɡreɪʃiˌeɪtɪŋ/

ingratiating

adulador
Meaning
Charming or flattering in a way intended to gain favor.
Example
His ingratiating smile made everyone trust him quickly.
Su sonrisa aduladora hizo que todos confiaran en él rápidamente.
C2 noun /ɪkˈsɔːr.ə/

Ixora

ixora
Meaning
a tropical flowering shrub with clusters of small bright red, orange, or yellow flowers
Example
The bright red ixora bushes lined the pathway to the tropical garden.
Los arbustos de ixora de color rojo brillante alineaban el camino hacia el jardín tropical.
C2 noun /ɪnˈsuːsiəns/

insouciance

despreocupación
Meaning
Casual lack of concern; indifference.
Example
She carried herself with an air of insouciance, unbothered by the challenges ahead.
Ella caminaba con un aire de despreocupación, sin preocuparse por los desafíos que venían.
C2 verb ɪmˈbaɪb

imbibe

absorber, asimilar, beber
Meaning
Absorb or assimilate ideas or knowledge. To drink or take in.
Example
He tried to imbibe the wisdom from his mentor.
Intentó absorber la sabiduría de su mentor.
C2 verb /ˌɪn.trəˈmɪt/

intromit

introducir
Meaning
To insert or introduce something into a place or body.
Example
The doctor carefully intromitted the instrument into the wound.
El doctor introdujo cuidadosamente el instrumento en la herida.
C2 noun /ˈɪnroʊd/

inroad

progreso
Meaning
An advance or significant progress, often at the expense of something else.
Example
The company made significant inroads into the mobile market.
La compañía hizo avances significativos en el mercado móvil.
C2 noun /ˈaɪdɪl/

idyll

escena idílica
Meaning
An extremely happy, peaceful, or picturesque episode or scene, often idealized.
Example
Their honeymoon was an idyll on a tropical island.
Su luna de miel fue una escena idílica en una isla tropical.
C2 adjective /ˌɪnfɪnɪˈtɛsɪməl/

infinitesimal

infinitesimal
Meaning
Extremely small in size or amount; so tiny as to be almost negligible.
Example
The error was so infinitesimal that it didn’t affect the results.
El error fue tan infinitesimal que no afectó los resultados.
C2 noun /ˌɪnˌkeɪpəˈbɪləti/

incapability

incapacidad
Meaning
lack of ability or power to do something; inability or incompetence
Example
His incapability to manage the team led to serious problems.
Su incapacidad para gestionar el equipo provocó problemas graves.
C2 adjective /ɪnˈseɪʃiət/

insatiate

insaciable
Meaning
impossible to satisfy; always wanting more
Example
He had an insatiate desire for power.
Él tenía un deseo insaciable de poder.
C2 adjective /ɪnˈkɒrɪdʒəbəl/

incorrigible

incorregible
Meaning
incapable of being corrected, improved, or reformed
Example
He is an incorrigible optimist who never loses hope.
Él es un optimista incorregible que nunca pierde la esperanza.
C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

El proceso de formar y desarrollar nuevas ideas o conceptos mediante pensamiento creativo y lluvia de ideas.
Meaning
The process of forming and developing new ideas or concepts through creative thinking and brainstorming.
Example
The team engaged in ideation sessions to generate new product ideas.
El equipo participó en sesiones de ideación para generar nuevas ideas de productos.
C2 adjective /ɪnˈsɛnʃənt/

insentient

insensible
Meaning
Lacking perception, consciousness, or sensation.
Example
The rock is an insentient object with no awareness.
La roca es un objeto insensible sin conciencia.
C2 adjective /ɪnˈɡlɔːriəs/

inglorious

deshonroso
Meaning
Causing shame or disgrace; not bringing honor or glory.
Example
The army suffered an inglorious defeat.
El ejército sufrió una derrota deshonrosa.
C2 noun /ˈaɪ.kɒn/

ikon

imagen religiosa o símbolo
Meaning
A religious image or symbol, especially in the Eastern Orthodox Church.
Example
The church displayed a beautifully painted ikon of the Virgin Mary.
La iglesia mostró un ícono bellamente pintado de la Virgen María.
C2 noun /ˌɪmpjuˈteɪʃən/

imputation

imputación
Meaning
an accusation or attribution of blame
Example
The politician denied the imputation of corruption.
El político negó la imputación de corrupción.
C2 adjective /ˌɪrɪˈlɪdʒəs/

irreligious

irreligioso
Meaning
Indifferent or hostile to religion
Example
Some people in the community consider him irreligious because he never attends religious services.
Algunas personas en la comunidad lo consideran irreligioso porque nunca asiste a los servicios religiosos.
C2 adjective /ɪˈnjʊərd/

inured

acostumbrado
Meaning
Accustomed to something, especially something unpleasant.
Example
After years of hardship, she was inured to suffering.
Después de años de sufrimiento, ella estaba acostumbrada al dolor.
C2 noun /ɪˈrɛvərəns/

irreverence

irreverencia
Meaning
a lack of respect for people or things that are generally taken seriously
Example
His jokes about religion showed irreverence to the sacred traditions.
Sus bromas sobre religión mostraron irreverencia hacia las tradiciones sagradas.
C2 noun /ˈaɪ.lət/

islet

islote
Meaning
A very small island.
Example
The fishermen rested on a tiny islet before continuing their journey.
Los pescadores descansaron en un islote pequeño antes de continuar su viaje.
C2 adjective /ˈɪkθiɪk/

ichthyic

ictíico
Meaning
Relating to or resembling fish.
Example
The artist's painting had an ichthyic quality.
La pintura del artista tenía una cualidad ictíica.
C2 adjective /ɪnˈfɜːrnəl/

infernal

infernal
Meaning
relating to hell; extremely troublesome or annoying
Example
The workers complained about the infernal noise from the construction site.
Los trabajadores se quejaron del ruido infernal proveniente del sitio de construcción.
C2 adjective /ˈɪnˌbrɛd/

inbred

innato
Meaning
existing naturally in a person or animal; also related to reproduction within a limited community
Example
He has an inbred sense of loyalty.
Él tiene un sentido innato de lealtad.
C2 adjective /ˈɪm.pi.əs/

Impious

impío; blasfemo
Meaning
irreligious; lacking reverence for religion; blasphemous
Example
The impious act shocked the religious community.
El acto impío sorprendió a la comunidad religiosa.
C2 noun /ɪnˈvaɪtər/

invitor

invitador
Meaning
a person who invites someone to an event, meeting, or place
Example
The invitor greeted all the guests warmly at the entrance.
El invitador saludó cordialmente a los invitados en la entrada.
C2 adjective /ɪnˈdjuːbɪtəbl/

indubitable

indudable
Meaning
Impossible to doubt; unquestionable.
Example
It is indubitable that hard work leads to success.
Es indudable que el trabajo duro lleva al éxito.
C2 adjective /ɪnˈvɛtərət/

inveterate

inmutable
Meaning
having a long-established habit, activity, or interest that is unlikely to change
Example
He is an inveterate reader who spends hours in the library every day.
Él es un lector inmutable que pasa horas en la biblioteca todos los días.
C2 adjective /ˌɪnˈekspɜːrt/

inexpert

inexperto
Meaning
not skilled or experienced; lacking expertise
Example
The inexpert handling of the machine caused several mistakes.
El manejo inexperto de la máquina causó varios errores.
C2 adjective /ˌɪnkoʊˈɜːrsəbl̩/

incoercible

incoercible
Meaning
Not capable of being forced, compelled, or restrained.
Example
Her incoercible spirit inspired others to fight for justice.
Su espíritu incoercible inspiró a otros a luchar por la justicia.
C2 adjective /ɪnˈtɛsteɪt/

intestate

muerto sin testamento
Meaning
Having died without leaving a valid will.
Example
She died intestate, so her assets were distributed by law.
Ella murió sin testamento, por lo que sus bienes fueron distribuidos por la ley.
C2 verb /ˈɪŋkʌlpeɪt/

inculpate

inculpar
Meaning
To blame or accuse someone of wrongdoing.
Example
The evidence seemed to inculpate the suspect in the crime.
La evidencia parecía inculpar al sospechoso en el crimen.
C2 noun (compound/erroneous entry) /ɪnˈɛksərəbl ɑːrmi/

inexorableinexorablearmy

ejército imparable
Meaning
This appears to be a corrupted or concatenated form; interpreted as 'inexorable army' — an unstoppable or relentless force.
Example
The rebels feared the inexorable army approaching their stronghold.
Los rebeldes temían al ejército imparable que se acercaba a su fortaleza.
C2 adjective /ɪnˈkɒŋɡruənt/

incongruent

incongruente
Meaning
Not in harmony or keeping with the surroundings or other aspects.
Example
His casual outfit looked incongruent at the formal dinner.
Su atuendo casual se veía incongruente en la cena formal.
C2 noun /ˌɪntərˈsɛʃən/

intercession

intercesión
Meaning
the act of intervening or pleading on behalf of another person
Example
The prisoner was released due to the intercession of influential leaders.
El prisionero fue liberado gracias a la intercesión de líderes influyentes.
C2 verb /ɪnˈdɒktrɪˌneɪt/

indoctrinate

adoctrinar
Meaning
To teach someone to fully accept a set of beliefs or ideas without question.
Example
The regime tried to indoctrinate the youth with propaganda.
El régimen trató de adoctrinar a la juventud con propaganda.
C2 noun /ˌɪndɛnˈteɪʃən/

indentation

sangría
Meaning
A space left at the beginning of a line of text; a notch or deep recess on a surface.
Example
The teacher asked the students to use proper indentation in their essays.
El profesor pidió a los estudiantes que usaran una sangría adecuada en sus ensayos.
C2 noun /ˌɪdiəˈsɪŋkrəsi/

idiosyncrasy

idiosincrasia
Meaning
A distinctive or peculiar characteristic, habit, or mannerism unique to an individual.
Example
One of her idiosyncrasies was humming while working.
Una de sus idiosincrasias era tararear mientras trabajaba.
C2 verb /ɪˈniː.bri.eɪt/

inebriate

embriagar
Meaning
to intoxicate; to make someone drunk
Example
The strong wine was enough to inebriate even the most experienced drinker.
El vino fuerte fue suficiente para embriagar incluso al bebedor más experimentado.
C2 adjective /ɪmˈpɪəriəs/

imperious

imperioso
Meaning
Arrogantly domineering or overbearing.
Example
Her imperious tone made it hard for others to argue.
Su tono imperioso dificultaba que los demás discutieran.
C2 adjective /ˌɪnɪkˈsprɛsəbl/

inexpressible

inexpresable
Meaning
Too strong or extreme to be expressed in words.
Example
She felt inexpressible joy at the news of her success.
Sintió una alegría inexpresable al enterarse de su éxito.
C2 noun /ɪmˌpɜːrtərbəˈbɪləti/

imperturbability

imperturbabilidad
Meaning
The quality of being calm and not easily disturbed or upset.
Example
Her imperturbability during the crisis impressed everyone.
Su imperturbabilidad durante la crisis impresionó a todos.
C2 noun /ˌɪnvəˈkeɪʃən/

invocation

invocación
Meaning
the act of calling upon a higher power for help, blessing, or inspiration
Example
The ceremony began with an invocation to the gods.
La ceremonia comenzó con una invocación a los dioses.
C2 adjective /ɪnˈsuːpərəbl/

insuperable

insuperable
Meaning
Impossible to overcome or surpass.
Example
The team faced insuperable challenges during the expedition.
El equipo enfrentó desafíos insuperables durante la expedición.
C2 noun /ɪnˈtɜːrmənt/

interment

entierro
Meaning
The act of burying a dead body in a grave or tomb.
Example
The interment took place at the family cemetery.
El entierro tuvo lugar en el cementerio familiar.
C2 verb /ɪnˈfætʃueɪt/

infatuate

embelesar
Meaning
to inspire with an intense but short-lived passion or admiration
Example
He was infatuated with her beauty.
Él estaba fascinado por su belleza.
C2 adjective /ɪmˈpræktɪkəbl/

impracticable

impracticable
Meaning
Not capable of being carried out or put into practice.
Example
The plan seemed impracticable due to limited resources.
El plan parecía impracticable debido a los recursos limitados.
C2 adjective /ɪnˈvʌlnərəbl/

invulnerable

invulnerable
Meaning
Impossible to harm, damage, or defeat.
Example
The fortress was thought to be invulnerable to attack.
Se pensaba que la fortaleza era invulnerable al ataque.
C2 noun /ɪˌledʒ.əˈbɪl.ə.ti/

Illegibility

ilegibilidad
Meaning
the quality of being impossible or difficult to read; unclear writing or print
Example
The doctor's handwriting was famous for its illegibility among the pharmacy staff.
La letra del médico era famosa por su ilegibilidad entre el personal de la farmacia.
C2 noun /ˌɪkθiˈɒlədʒi/

ichthyology

icthología
Meaning
The branch of zoology that deals with fish.
Example
He pursued a degree in ichthyology at the university.
Obtuvo un título en ictiología en la universidad.
C2 noun /ˈɪl.i.æd/

iliad

Ilíada
Meaning
An ancient Greek epic poem attributed to Homer, describing the events of the Trojan War.
Example
Students studied the Iliad to understand Greek mythology and heroism.
Los estudiantes estudiaron la Ilíada para entender la mitología griega y el heroísmo.
C2 adjective /ɪmˈperɪʃəbəl/

Imperishable

imperdurable; eterno; imperecedero
Meaning
not subject to decay; lasting forever; eternal
Example
The imperishable beauty of classical art continues to inspire generations.
La belleza imperecedera del arte clásico sigue inspirando generaciones.
C2 adjective /ˌɪnkɒntrəˈvɜːtəbl/

incontrovertible

incontrovertible
Meaning
impossible to deny or dispute; unquestionable
Example
The evidence was incontrovertible and proved his innocence.
La evidencia era incontrovertible y demostró su inocencia.
C2 noun /ɪˈmɒdəsti/

immodesty

immodestia
Meaning
lack of modesty or decency; behavior or attitude that is overly bold or improper
Example
The article was criticized for its tone of immodesty.
El artículo fue criticado por su tono de immodestia.
C2 adjective /ɪˈnɪkwɪtəs/

iniquitous

iniquo
Meaning
grossly unfair and morally wrong
Example
Slavery was one of the most iniquitous practices in history.
La esclavitud fue una de las prácticas más iniquas de la historia.
C2 adjective /ˌɪrɪˈmiːdiəbl̩/

irremediable

irremediable
Meaning
Impossible to cure, repair, or remedy.
Example
The damage to the ancient manuscript was irremediable.
El daño al antiguo manuscrito era irremediable.
C2 noun /ˈænʒənuː/

ingenue

jovencita inocente
Meaning
an innocent, naïve young woman, especially as represented in literature or theater
Example
She played the role of the ingénue in the play with great charm.
Ella interpretó el papel de la jovencita inocente en la obra con gran encanto.
C2 noun /aɪˈdɒlətri/

idolatry

idolatría
Meaning
The worship of idols or extreme admiration for someone or something.
Example
The priest condemned the idolatry practiced in the village.
El sacerdote condenó la idolatría practicada en el pueblo.
C2 adjective /ˌɪnkəmˈprɛsəbl/

incompressible

incompresible
Meaning
Not able to be pressed or squeezed into a smaller space.
Example
Liquids are generally considered incompressible.
Los líquidos generalmente se consideran incomprensibles.
C2 noun /ɪˈreɪdiəns/

irradiance

irradiancia
Meaning
the quality of shining brightly; the intensity of light falling on a surface
Example
The irradiance of the sun at noon was overwhelming.
La irradiancia del sol al mediodía era abrumadora.
C2 adjective /ˌɪn.trəˈmjʊə.rəl/

intramural

dentro de la institución
Meaning
Occurring within the walls of a single institution, especially a school or college.
Example
The college organizes intramural sports competitions every semester.
La universidad organiza competencias deportivas intramuros cada semestre.
C2 noun /ɪˈnɪkwɪti/

iniquity

iniquidad
Meaning
Immoral or grossly unfair behavior.
Example
The dictator's regime was marked by corruption and iniquity.
El régimen del dictador estuvo marcado por la corrupción y la iniquidad.
C2 noun /ˌɪntərˈrɛɡnəm/

interregnum

interregno
Meaning
A period between rulers or governments when normal leadership is suspended.
Example
The country faced instability during the interregnum after the king’s death.
El país enfrentó inestabilidad durante el interregno después de la muerte del rey.
C2 adjective ɪnˈfiː.zə.bəl

infeasible

invable
Meaning
Not possible to do easily or conveniently; impracticable.
Example
Restoring the forest may become infeasible if destruction continues.
Restaurar el bosque puede volverse inviable si la destrucción continúa.
C2 adjective ɪnˈdɒm.ɪ.tə.bəl

indomitable

indomable
Meaning
Impossible to subdue or defeat.
Example
Her indomitable spirit helped her overcome adversity.
Su espíritu indomable la ayudó a superar la adversidad.
C2 verb /ɪnˈhjuːm/

inhume

inhumar
Meaning
to bury a dead body in the ground
Example
They inhumed the warrior with full honors.
Ellos inhumaron al guerrero con todos los honores.
C2 noun /ɪnˈvɛstɪtʃər/

investiture

ceremonia de investidura
Meaning
the formal ceremony of conferring authority, rank, or office
Example
The king held an investiture ceremony for the new knight.
El rey celebró una ceremonia de investidura para el nuevo caballero.
C2 noun /ˈɪn.fɪ.del/

Infidel

infiel
Meaning
a person who does not believe in religion or whose religious beliefs differ from one's own
Example
In historical contexts, crusaders often referred to their enemies as infidels.
En contextos históricos, los cruzados a menudo se referían a sus enemigos como infieles.
C2 noun /ˌɪrɪˈdɛsəns/

iridescence

brillo iridiscente
Meaning
a play of lustrous, changing colors like those of a rainbow
Example
The butterfly's wings shimmered with iridescence.
Las alas de la mariposa brillaban con brillo iridiscente.
C2 noun /ɪnˈhɪərəns/

inherence

inherencia
Meaning
The state of being an essential or permanent part of something.
Example
The inherence of risk is part of every business venture.
La inherencia del riesgo es parte de cada aventura empresarial.
C2 verb /ɪˈreɪdieɪt/

irradiate

irradiar
Meaning
to shine light on something; to expose to radiation; to illuminate or brighten
Example
The scientist used a lamp to irradiate the sample.
El científico usó una lámpara para irradiar la muestra.
C2 noun /ˌɪntərˈlɒkjətər/

interlocutor

interlocutor
Meaning
a person who takes part in a conversation or dialogue
Example
She was a skilled interlocutor during the debate.
Ella era una interlocutora hábil durante el debate.
C2 noun /ɪnˌtɜːrpəˈleɪʃən/

interpolation

interpolación
Meaning
The act of inserting something into a text or estimating values within a sequence of data.
Example
The scientist used interpolation to predict the missing data points.
El científico usó interpolación para predecir los puntos de datos faltantes.
C2 verb /ɪnˈveɪ/

inveigh

criticar duramente
Meaning
To speak or write about something with great hostility and criticism.
Example
He inveighed against the corruption in government.
Él criticó duramente la corrupción en el gobierno.
C2 noun /ˌɪnəməˈrɑːtə/

inamorata

amante
Meaning
A woman with whom someone is in love; a female lover.
Example
He wrote a poem dedicated to his inamorata.
Escribió un poema dedicado a su enamorada.
C2 adjective /ɪnˈsɛnseɪt/

insensate

insensible
Meaning
lacking physical sensation or empathy; without feeling or sensitivity
Example
The dictator's insensate cruelty shocked the world.
La crueldad insensible del dictador sorprendió al mundo.
C2 noun /ˌɪmprɪˈmɑːtər/

imprimatur

imprimátur
Meaning
An official license or approval, especially to publish a book.
Example
The book was released with the official imprimatur of the church.
El libro fue lanzado con el imprimátur oficial de la iglesia.
C2 noun /ˈɪrɪtənsi/

irritancy

irritación
Meaning
the quality or state of causing irritation; legal or formal invalidation
Example
The constant noise became an irritancy to the neighbors.
El ruido constante se convirtió en una irritación para los vecinos.
C2 adjective /ˌɪnɪˈsɛnʃəl/

inessential

inesencial
Meaning
not necessary or important; not essential
Example
The report removes all inessential details to stay focused.
El informe elimina los detalles inesenciales para mantenerse enfocado.
C2 adjective /ˌɪndaɪˈdʒestəbəl/

Indigestible

indigerible; difícil de digerir
Meaning
difficult or impossible to digest; hard to process in the stomach
Example
The old bread became hard and indigestible.
El pan viejo se volvió duro e indigesto.
C2 adjective/verb /ɪnˈkɑːrneɪt/

incarnate

encarnado
Meaning
to embody or represent in human form; in flesh
Example
She is kindness incarnate.
Ella es la bondad encarnada.
C2 adjective /ɪnˈsuːsiənt/

insouciant

despreocupado
Meaning
Showing a casual lack of concern; carefree.
Example
He gave an insouciant shrug and walked away.
Hizo un encogimiento de hombros despreocupado y se alejó.
C2 verb /ˌɪntərˈsiːd/

intercede

interceder
Meaning
to act or plead on behalf of someone in difficulty or trouble; to intervene between parties to help resolve a dispute
Example
She interceded with the teacher to give her brother another chance.
Ella intercedió con el maestro para darle otra oportunidad a su hermano.
C2 noun /ˈɪntərˌloʊpər/

interloper

intruso
Meaning
A person who becomes involved in a situation or place where they are not wanted.
Example
He felt like an interloper at the private family gathering.
Se sintió como un intruso en la reunión familiar privada.
C2 adjective /ɪnˈsɛptɪv/

inceptive

inicial
Meaning
Relating to or marking the beginning or initial stage of something.
Example
The inceptive phase of the project was marked by enthusiastic planning.
La fase inicial del proyecto fue marcada por una planificación entusiasta.
C2 adjective/noun /ɪnˈkɑːrnədiːn/

incarnadine

rojo intenso
Meaning
a bright crimson or pinkish-red color
Example
The sky turned incarnadine at sunset.
El cielo se tornó rojo intenso al atardecer.
C2 verb /ˌɪnkəˈpæsɪteɪt/

incapacitate

incapacitar
Meaning
to deprive someone or something of the ability or strength to function
Example
The severe injury incapacitated the player for the rest of the season.
La grave lesión incapacitó al jugador para el resto de la temporada.
C2 verb /ˌɪmpɔːrˈtuːnd/

importuned

insistir persistentemente
Meaning
asked someone persistently and pressingly for something
Example
She importuned her boss for a raise until he finally gave in.
Ella insistió persistentemente a su jefe por un aumento hasta que finalmente accedió.
C2 noun /ˈɪntəˌkrɒpɪŋ/

intercropping

cultivo intercalado
Meaning
The agricultural practice of cultivating two or more crops simultaneously in the same field to maximize land use efficiency and improve soil health.
Example
Intercropping can help improve soil fertility and pest control.
El cultivo intercalado puede ayudar a mejorar la fertilidad del suelo y el control de plagas.
C2 adjective /ɪˈmɒdərət/

immoderate

excesivo
Meaning
excessive; beyond reasonable limits
Example
He has an immoderate love for sweets.
Él tiene un amor excesivo por los dulces.
C2 noun /ˌɪn.təˈvɛn.ʃə.nɪ.zəm/

interventionism

intervencionismo
Meaning
Government policy of active involvement in economic affairs.
Example
The central bank's interventionism helped stabilize inflation.
El intervencionismo del banco central ayudó a estabilizar la inflación.
C2 verb /ɪmˈpjuːn/

impugn

disputar la verdad, validez o honestidad de una declaración o motivo
Meaning
to dispute the truth, validity, or honesty of a statement or motive
Example
The lawyer tried to impugn the credibility of the witness.
El abogado intentó impugnar la credibilidad del testigo.
C2 adjective /ˌɪntərˈniːsaɪn/

internecine

conflicto interno
Meaning
Relating to conflict within a group, often causing mutual destruction.
Example
The internecine conflict weakened the organization from within.
El conflicto interno debilitó la organización desde dentro
C2 noun /ˈaɪ.səˌbɑːr/

isobar

isóbara
Meaning
A line on a weather map connecting points of equal atmospheric pressure.
Example
The meteorologist explained how isobars indicate wind speed and direction.
El meteorólogo explicó cómo las isóbaras indican la velocidad y dirección del viento.
C2 adjective /ɪnˈæpt/

Inapt

inadecuado; inapropiado; impropio
Meaning
not suitable; inappropriate; unfit
Example
His comment was inapt for the formal meeting.
Su comentario fue inapropiado para la reunión formal.