inure
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C2 verb /ɪˈnjʊər/

inure

acostumbrar
Meaning
To become accustomed to something, especially something unpleasant.
Example
Soldiers quickly became inured to the harsh conditions.
Los soldados rápidamente se acostumbraron a las duras condiciones.
C1 adjective /ɪnˈdʒʊəriəs/

injurious

perjudicial
Meaning
Causing or likely to cause harm or damage.
Example
Smoking is injurious to health.
Fumar es perjudicial para la salud.
A1 pronoun /aɪ/

i

yo
Meaning
used by a speaker to refer to himself or herself
Example
I am learning English every day.
Yo estoy aprendiendo inglés todos los días.
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 adjective /ˈɪn.dɪ.dʒənt/

indigent

indigente
Meaning
lacking the necessities of life due to poverty; very poor
Example
The hospital offers free care to indigent patients.
El hospital ofrece atención gratuita a los pacientes indigentes.
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.
C1 adjective /ˌɪnkənˈkluːsɪv/

inconclusive

inconcluso
Meaning
Not leading to a definite result or decision.
Example
The investigation remained inconclusive due to a lack of evidence.
La investigación permaneció inconclusa debido a la falta de evidencia.
C1 adjective /ˌɪntəˈrɑːɡətɪv/

interrogative

interrogativo
Meaning
Relating to or conveying a question; in grammar, used to form questions.
Example
She raised an interrogative eyebrow when she heard the news.
Ella levantó una ceja interrogativa cuando escuchó la noticia.
B2 adjective /ɪˈmɒrəl/

immoral

inmoral
Meaning
Not conforming to accepted standards of morality; unethical or wicked.
Example
He was fired for his immoral behavior.
Lo despidieron por su comportamiento inmoral.
C2 noun /ˈɪrɪɡənt/

irrigant

líquido de riego
Meaning
A liquid used for irrigation, especially in medical or agricultural contexts.
Example
The doctor used a sterile irrigant during the procedure.
El doctor usó un irrigante estéril durante el procedimiento.
C2 noun /ˈaɪsinəs/

iciness

frialdad
Meaning
The state of being cold in manner or temperature.
Example
There was a distinct iciness in his voice.
Había una clara frialdad en su voz.
C1 adjective /ɪnˈstɪŋk.tɪv/

instinctive

instintivo, natural, automático
Meaning
Based on instinct; done without conscious thought; natural and automatic.
Example
His instinctive reaction saved his life.
Su reacción instintiva le salvó la vida.
C1 noun ɪnˈflɛk.ʃən

inflection

inflexión
Meaning
The change in pitch or tone of voice when speaking for emphasis.
Example
His inflection kept the audience engaged.
Su inflexión mantuvo al público comprometido.
C1 adjective ˈɪn.lənd

Inland

del interior
Meaning
Situated in the interior of a country; away from the coast.
Example
Inland transport boosts local trade.
El transporte del interior impulsa el comercio local.
C1 verb ɪˈnɪʃɪeɪtɪd

initiated

iniciado
Meaning
Caused a process or action to begin; started something.
Example
The project was initiated to enhance marine biodiversity.
El proyecto fue iniciado para mejorar la biodiversidad marina.
C1 noun /ɪmˈprɪzənmənt/

imprisonment

encarcelamiento
Meaning
the act of putting someone in prison; the state of being confined as punishment
Example
He faced imprisonment for violating the court order.
Se enfrentó al encarcelamiento por violar la orden judicial.
B2 noun /ˈɪnfənt/

infant

bebé
Meaning
A very young child or baby.
Example
The infant was sleeping peacefully in the cradle.
El bebé estaba durmiendo tranquilamente en la cuna.
C2 noun /ɪˈnænɪti/

inanity

tonterías, necedades
Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
El discurso estaba lleno de tonterías que aburrían a la audiencia.
C1 adjective /ɪmˈprɒmp.tjuː/

impromptu

imprevisto
Meaning
Done without being planned, organized, or rehearsed; spontaneous.
Example
He gave an impromptu speech at the event.
Él dio un discurso improvisado en el evento.
C2 adjective /ˌaɪsəʊˈθɜːrməl/

isothermal

isotérmico
Meaning
Having or maintaining equal or constant temperature.
Example
The experiment was conducted under isothermal conditions.
El experimento se realizó bajo condiciones isotérmicas.
C2 noun /ˈaɪdlər/

idler

holgazán
Meaning
A person who avoids work or spends time lazily.
Example
He was known as an idler who wasted his days.
Él era conocido como un holgazán que desperdiciaba sus días.
C1 adjective /ɪˈmjuː.tə.bəl/

immutable

inmutable
Meaning
Unchangeable, permanent, or fixed
Example
The laws of physics are considered immutable.
Las leyes de la física son consideradas inmutables.
B1 noun /ˌɪntərˈækʃən/

interaction

interacción mutua
Meaning
The process of people or things acting upon or influencing each other.
Example
The teacher encouraged more interaction between students.
El maestro alentó más interacción entre los estudiantes.
B1 verb /ˈɪndɪkeɪt/

indicate

indicar
Meaning
to point out; to show or suggest; to be a sign of
Example
The red light indicates that you should stop.
La luz roja indica que debes parar.
C1 adjective /ɪnˈflæməˌtɔːri/

inflammatory

felicidad
Meaning
causing inflammation in the body; arousing anger, hostility, or strong emotion
Example
His inflammatory speech triggered protests across the city.
No pudo esconder su felicidad cuando recibió el premio.
A2 adverb /ˌɪnˈdɔːrz/

indoors

en el interior
Meaning
inside a building; within an enclosed space
Example
Because of the rain, everyone stayed indoors.
Debido a la lluvia, todos se quedaron en el interior.
C1 noun /ˌɪnækˈtɪvɪti/

inactivity

inactividad
Meaning
the state of not being active physically or mentally; lack of action
Example
Prolonged inactivity can negatively affect both physical and mental health.
La inactividad prolongada puede afectar negativamente la salud física y mental.
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.
B2 adjective /ɪnˈtɛnsɪv/

intensive

intenso
Meaning
Involving a lot of effort, energy, or concentration in a short period of time.
Example
She attended an intensive English course before moving abroad.
Ella asistió a un curso intensivo de inglés antes de mudarse al extranjero.
C1 adjective /ɪmˈpæsəbəl/

impassable

intransitable
Meaning
Impossible to travel along or over.
Example
The road became impassable after the heavy snowfall.
La carretera se volvió intransitable después de la fuerte nevada.
B2 adjective /aɪˈrɒnɪk/

ironic

irónico, sarcástico
Meaning
happening in the opposite way to what is expected, often amusing or sarcastic
Example
It is ironic that the fire station burned down.
Es irónico que la estación de bomberos se haya quemado.
C2 noun /ˈɪnsələns/

insolence

insolencia
Meaning
rude or disrespectful behavior
Example
The teacher was shocked by the student's insolence.
El maestro se sorprendió por la insolencia del estudiante.
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.
C1 adjective ɪnɪɡˈzɔːstɪbəl

inexhaustible

inagotable
Meaning
Unable to be used up or worn out; limitless.
Example
His inexhaustible energy allowed him to work tirelessly on his projects.
Su energía inagotable le permitió trabajar incansablemente en sus proyectos.
A2 noun /ɪmˈpɔːtəns/

importance

importancia
Meaning
The quality or state of being important; consequence or significance.
Example
The importance of time management cannot be overstated.
La importancia de la gestión del tiempo no puede ser exagerada.
C1 adjective ˌɪdiəsɪnˈkrætɪk

idiosyncratic

peculiar e individual
Meaning
Relating to idiosyncrasy; peculiar or individual.
Example
His idiosyncratic behavior set him apart from his colleagues.
Su comportamiento idiosincrático lo diferenciaba de sus compañeros.
B2 noun ɪnˈsɛntɪvz

incentives

incentivos
Meaning
Things that motivate or encourage one to do something.
Example
Tax incentives are used to encourage investment in renewable energy.
Se utilizan incentivos fiscales para fomentar la inversión en energía renovable.
A2 noun /ˈɪʃ.uːz/

issues

problemas
Meaning
Important topics or problems for debate or discussion.
Example
Health issues from pollution are increasing.
Los problemas de salud causados por la contaminación están aumentando.
C2 adjective /ɪˈrɛzəluːt/

irresolute

indeciso
Meaning
uncertain or indecisive; lacking determination
Example
He stood irresolute at the crossroads, unsure which path to take.
Él se quedó indeciso en el cruce de caminos, sin saber qué camino tomar.
C2 adjective /ɪnˈsɛndiˌɛri/

incendiary

incendiario / provocador
Meaning
designed to cause fires or stir up conflict
Example
The politician’s incendiary remarks angered the crowd.
Las declaraciones incendiarias del político enfurecieron a la multitud.
B2 noun /ɪmˈpɒlɪtnəs/

impoliteness

descortesía
Meaning
lack of good manners or courtesy; rude behavior
Example
His impoliteness towards the guests shocked everyone.
Su descortesía hacia los invitados sorprendió a todos.
C1 noun ˌɪndɪˈspensəbl̩ ˈkɒmpɪtənsi

indispensable competency

competencia indispensable
Meaning
Essential skill or ability that cannot be done without; a crucial capability that is absolutely necessary.
Example
Digital literacy is an indispensable competency in the 21st century.
La alfabetización digital es una competencia indispensable en el siglo XXI.
C2 adjective /ɪnˈkɒnstənt/

inconstant

inconstante
Meaning
frequently changing; not consistent or dependable
Example
His inconstant moods made it difficult to work with him.
Sus estados de ánimo inconstantes hacían difícil trabajar con él.
C2 noun /ɪmp/

imp

pequeño diablillo travieso
Meaning
a small mischievous devil or sprite; a playful troublemaker
Example
The child was acting like a little imp, hiding his toys everywhere.
El niño se comportaba como un pequeño diablillo, escondiendo sus juguetes por todas partes.
C1 adjective /ɪˈlɒdʒ.ɪ.kəl/

Illogical

Ilógico
Meaning
not reasonable or sensible; lacking logic
Example
It would be illogical to go swimming in such cold weather.
Sería ilógico nadar en un clima tan frío.
C2 adjective /ˌɪrɪˈtriːvəbl/

irretrievable

irrecuperable
Meaning
impossible to recover or regain
Example
The documents were lost in an irretrievable way after the fire.
Los documentos se perdieron de manera irrecuperable después del incendio.
B2 noun /ɪnˈkluːʒən/

inclusion

inclusión
Meaning
the action or state of including or being included within a group or structure
Example
Diversity and inclusion are key values in modern workplaces.
La diversidad y la inclusión son valores clave en los lugares de trabajo modernos.
B2 verb ɪnˈvɛst.ɪŋ

investing

invertir
Meaning
The act of putting money into financial schemes, shares, property, or a commercial venture with the expectation of achieving a profit.
Example
Investing in stocks can generate long-term wealth.
Invertir en acciones puede generar riqueza a largo plazo.
B1 verb /ˈɪndʒər/

injure

lesionar
Meaning
to cause physical harm or damage to someone or something
Example
He injured his leg while playing football.
Él lesionó su pierna mientras jugaba al fútbol.
C1 verb /ɪmˈpɛər/

impair

deteriorar
Meaning
to weaken or damage something, especially a function or ability
Example
Smoking can impair your lung capacity.
Fumar puede dañar tu capacidad pulmonar.
C1 adjective /ˌɪnækˈsɛsəbl/

inaccessible

inaccesible
Meaning
unable to be reached, entered, or understood
Example
The remote village is almost inaccessible during the rainy season.
El pueblo remoto es casi inaccesible durante la temporada de lluvias.
C1 verb /ɪnˈkɑːrsəreɪt/

incarcerate

encarcelar
Meaning
to imprison or confine someone
Example
The authorities incarcerated the criminal after the trial.
Las autoridades encarcelaron al criminal después del juicio.
C2 adjective /ˌɪnɪkˈstɛnsəbl/

inextensible

inextensible
Meaning
Not capable of being stretched or extended.
Example
This rope is made of an inextensible material.
Esta cuerda está hecha de un material inextensible.
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 /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.
C1 adjective /ˌɪməˈtɪəriəl/

immaterial

inmaterial
Meaning
Not important or relevant; lacking physical substance.
Example
The judge ruled that the argument was immaterial to the case.
El juez falló que el argumento no era relevante para el caso.
C2 adjective /ɪnˈtræn.sɪ.dʒənt/

intransigent

intransigente, terco, obstinado
Meaning
Unwilling or refusing to change one's views or to agree about something.
Example
His intransigent stance delayed the agreement.
Su postura intransigente retrasó el acuerdo.
C1 noun /aɪˈtɪnərɛri/

itinerary

itinerario
Meaning
A planned route or schedule of a journey or trip.
Example
The travel agent gave us a detailed itinerary for our vacation.
El agente de viajes nos dio un itinerario detallado para nuestras vacaciones.
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.
B2 adjective /ˌɪnkəmˈpliːt/

incomplete

incompleto
Meaning
Not finished, lacking some parts or not whole.
Example
Her report was incomplete and needed further details.
Su informe estaba incompleto y necesitaba más detalles.
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.
C1 noun /ˌɪntərˌɒpərəˈbɪləti/

interoperability

interoperabilidad
Meaning
The ability of computer systems or software to exchange and make use of information.
Example
The interoperability of different software systems ensures seamless workflow.
La interoperabilidad de diferentes sistemas de software asegura un flujo de trabajo continuo.
C1 noun /ɪmˌpɒsəˈbɪlɪti/

impossibility

imposibilidad
Meaning
the state or fact of being impossible; something that cannot be done or achieved
Example
Finishing the project in one day was an impossibility.
Terminar el proyecto en un día fue una imposibilidad.
C2 verb /ɪnˈveɪɡəl/

inveigle

engatusar
Meaning
To persuade someone to do something by deception or flattery.
Example
She inveigled him into signing the contract.
Ella lo engañó para que firmara el contrato.
C1 adjective /ɪnˈtjuː.ɪ.tɪv/

intuitive

intuitivo
Meaning
Based on instinctive understanding rather than reasoning.
Example
The software has an intuitive design that makes it easy to use.
El software tiene un diseño intuitivo que lo hace fácil de usar.
B1 verb /ɪnˈtend/

intend

intentar
Meaning
to plan or have in mind as a purpose; to mean
Example
I intend to finish this project by tomorrow.
Tengo la intención de terminar este proyecto para mañana.
C2 noun /ˌɪnkænˈteɪʃən/

incantation

encantación
Meaning
a series of words used as a magic spell or charm
Example
The wizard chanted an incantation to summon the spirits.
El mago recitó una encantación para invocar los espíritus.
C1 adjective /ˈɪnbɔːrn/

Inborn

innato; congénito; inherente
Meaning
existing from birth; natural; inherent
Example
She has an inborn talent for music.
Ella tiene un talento innato para la música.
C1 noun /ɪˌluːmɪˈneɪʃən/

illumination

iluminación
Meaning
the act of lighting something or making something clear
Example
The street was filled with bright illumination from the lamps.
La calle estaba llena de una iluminacion brillante proveniente de las lamparas.
C2 adjective /ˌɪnsəˈluːbriəs/

insalubrious

insalubre
Meaning
Unhealthy or not conducive to well-being.
Example
They moved out of the insalubrious neighborhood for the sake of their health.
Se mudaron del vecindario insalubre por el bien de su salud
C2 verb /ɪˈluːmɪn/

illumine

iluminar
Meaning
to light up or make clear
Example
The rising sun illumined the mountain peaks.
El sol naciente iluminó las cumbres de la montaña.
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.
C1 adjective /ɪnˈkɒmp(ə)rəbl/

incomparable

incomparable
Meaning
Without an equal in quality or excellence; matchless.
Example
The view from the mountain was incomparable.
La vista desde la montaña era incomparable.
C1 adjective /ɪnˈɔːdəbl/

inaudible

ininteligible
Meaning
Unable to be heard.
Example
Her voice was almost inaudible over the noise.
Su voz era casi ininteligible sobre el ruido.
C2 verb /ɪnˈdɛmnɪfaɪ/

indemnify

indemnizar
Meaning
to compensate someone for harm or loss; to secure against future damage or cost
Example
The insurance company agreed to indemnify the client for the damages.
La compañía de seguros acordó indemnizar al cliente por los daños.
C2 adjective /aɪˈsɒ.krə.nəs/

isochronous

aconteciendo a intervalos de tiempo iguales
Meaning
Occurring at equal time intervals; in unison or synchrony.
Example
The pendulum swings are isochronous, repeating at equal intervals.
Los oscilaciones del péndulo son isócronos, repitiendo a intervalos iguales.
C2 adjective /ˌɪntərˈlɒkjətəri/

interlocutory

provisional
Meaning
Given during the course of a legal action, not final but temporary or provisional.
Example
The judge issued an interlocutory order to maintain the status quo until the hearing.
El juez emitió una orden provisional para mantener el statu quo hasta la audiencia.
C1 adjective /ɪˈrɛvərənt/

irreverent

irreverente
Meaning
showing a lack of respect for people or things that are usually respected
Example
The comedian’s irreverent jokes offended some of the audience.
Los chistes irreverentes del comediante ofendieron a algunos de la audiencia.
B1 verb /ɪnˈkriːst/

increased

aumentado
Meaning
became greater in size, amount, or degree
Example
The company's revenue increased last year.
Los ingresos de la compañía aumentaron el año pasado.
C1 verb /ˈɪmplɪˌkeɪt/

implicate

implicar
Meaning
To show someone’s involvement in a crime or wrongdoing.
Example
The evidence implicated several officials in the scandal.
La evidencia implicó a varios funcionarios en el escándalo.
B1 adjective ˈɪnəveɪtɪv

innovative

innovador
Meaning
Featuring new methods; advanced and original
Example
Innovative strategies are required to combat pollution.
Se requieren estrategias innovadoras para combatir la contaminación.
C1 adjective /ɪnˈɛlɪdʒəbəl/

Ineligible

inelegible; no apto; no cualificado
Meaning
not qualified or entitled to participate or be chosen; unsuitable
Example
Students with poor grades are ineligible for the scholarship program.
Los estudiantes con calificaciones bajas no son elegibles para el programa de becas.
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.
B2 noun /ɪnˌtɜːrprəˈteɪʃən/

interpretation

interpretación
Meaning
the action of explaining the meaning of something
Example
The teacher gave her own interpretation of the poem.
La profesora dio su propia interpretación del poema.
B2 adjective ˈaɪsəˌleɪtɪd

isolated

aislado
Meaning
Alone or separated from others; having little or no contact with other people.
Example
Technological advancements often leave people isolated.
Los avances tecnológicos a menudo dejan a las personas aisladas.
B2 noun ˌɪn.əˈveɪ.ʃən

innovation

innovación
Meaning
The action or process of innovating; a new method, idea, product, etc.
Example
Innovation drives solutions to global challenges.
La innovación impulsa soluciones a los desafíos globales.
B2 adjective /ˈɪn.tɪ.mət/

Intimate

íntimo; cercano; privado
Meaning
close in friendship; private and personal; detailed knowledge
Example
They have an intimate friendship that has lasted for decades.
Ellos tienen una amistad íntima que ha durado décadas.
C1 adjective /ɪnˈkwɪzɪtɪv/

inquisitive

inquisitivo
Meaning
Curious or eager to learn and ask questions.
Example
The inquisitive child asked endless questions about the stars.
El niño inquisitivo hizo preguntas interminables sobre las estrellas.
C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

inorgánico
Meaning
relating to substances that are not derived from living organisms; lacking organic structure or growth
Example
Inorganic compounds are commonly studied in chemistry labs.
Los compuestos inorgánicos se estudian en los laboratorios.
C2 noun /ˈɪmpjʊdəns/

impudence

desvergüenza
Meaning
Rude and disrespectful behavior.
Example
The student's impudence shocked the entire class.
La desvergüenza del estudiante sorprendió a toda la clase.
B2 verb /ˌɪntərˈfɪər/

interfere

felicidad
Meaning
to become involved in something that is not your concern; to hinder or obstruct
Example
Parents should not interfere in their children’s personal choices.
No pudo ocultar su felicidad cuando recibió el premio.
C1 noun /ɪnˈdʒʌŋkʃən/

injunction

orden judicial
Meaning
A judicial order restraining a person from an action or compelling a certain act.
Example
The court issued an injunction to stop the company from polluting the river.
El tribunal emitió una orden judicial para evitar que la empresa contaminara el río.
C1 adjective /ˌɪnkəmˈpætəbl/

incompatible

incompatible
Meaning
Not able to exist or work together without conflict.
Example
Their personalities were completely incompatible.
Sus personalidades eran completamente incompatibles.
C1 noun /ɪmˈpɜːrtɪnəns/

impertinence

impertinencia
Meaning
lack of respect; rudeness
Example
The teacher was shocked by the student's impertinence.
El maestro se sorprendió por la impertinencia del estudiante.
C1 noun /ˈɪn.trə.vɜːrt/

introvert

introvertido
Meaning
A person who tends to be shy and prefers spending time alone rather than in groups.
Example
As an introvert, he preferred reading over attending parties.
Como introvertido, prefería leer en lugar de asistir a fiestas.
C2 noun /ɪnˈtɜːrstɪs/

interstice

hendidura
Meaning
a small space that lies between things
Example
Light filtered through the narrow interstices of the wall.
La luz se filtró a través de las estrechas hendiduras de la pared.
C1 noun /ɪnˈtɛstɪn/

intestine

intestino
Meaning
The part of the digestive system where food is digested and absorbed, extending from the stomach to the anus.
Example
The doctor explained how nutrients are absorbed in the small intestine.
El doctor explicó cómo los nutrientes se absorben en el intestino delgado.
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 adjective /ɪmˌpɜːrˈsweɪdəbl/

impersuadable

inconvencible
Meaning
not able to be convinced or persuaded
Example
She remained impersuadable despite all our arguments.
Ella permaneció inconvencible a pesar de todos nuestros argumentos.
C1 noun ˌɪnsjʊˈleɪʃən

insulation

aislamiento
Meaning
Material used to prevent heat, sound, or electricity from being transmitted from one area to another.
Example
Insulation of food storage areas can prevent pests from entering.
El aislamiento de las áreas de almacenamiento de alimentos puede evitar que entren plagas.
C1 adjective /ɪnˈveə.ri.ə.bəl/

Invariable

invariable; constante; siempre igual
Meaning
never changing; constant; always the same
Example
His invariable routine includes morning exercise and coffee.
Su rutina invariable incluye ejercicio por la mañana y café.
C1 adjective /ˈɪmpətənt/

impotent

impotente
Meaning
Lacking power, ability, or strength to take effective action.
Example
The citizens felt impotent against the corrupt system.
Los ciudadanos se sintieron impotentes contra el sistema corrupto.
C2 adverb /ˈɪntʃmiːl/

inchmeal

poco a poco
Meaning
Gradually, little by little.
Example
The old castle fell inchmeal into ruin.
El viejo castillo cayó poco a poco en ruinas.
C1 verb /ɪnˈvoʊk/

invoke

invocar
Meaning
to call upon a higher power, authority, or principle for help, support, or justification
Example
The lawyer invoked the constitution to defend his client.
El abogado invocó la constitución para defender a su cliente.
C1 verb /ɪmˈpɛrɪl/

imperil

poner en peligro
Meaning
To put in danger or at risk.
Example
Reckless driving can imperil the lives of others.
La conducción imprudente puede poner en peligro la vida de otros.
B2 noun /ˈɪnvənˌtɔːri/

inventory

inventario
Meaning
A complete list of items, such as goods in stock or property.
Example
The shopkeeper checked the inventory before opening the store.
El tendero revisó el inventario antes de abrir la tienda.
C1 noun ˌɪn.fɪlˈtreɪ.ʃən

infiltration

infiltración, acceso secreto
Meaning
The process of entering or gaining access to an organization or place surreptitiously.
Example
Cybersecurity prevents infiltration into sensitive data.
La ciberseguridad previene la infiltración en datos sensibles.
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 /ˈɪl bred/

Ill-bred

maleducado
Meaning
lacking good manners; rude; showing poor upbringing
Example
His ill-bred behavior shocked everyone at the dinner party.
Su conducta maleducada dejó a todos sorprendidos en la cena.
C2 adjective /ˌɪndɪˈvɜːrtɪbəl/

indivertible

no desviable
Meaning
Not able to be turned aside or diverted.
Example
The judge's indivertible attention was on the case.
La atención del juez no podía desviarse del caso.
C1 adjective /ˌɪrɪˈvɜːrsəbl/

irreversible

irreversible
Meaning
Not able to be undone, changed, or reversed.
Example
The damage caused by the fire was irreversible.
El daño causado por el fuego fue irreversible.
C1 noun ˌɪndɪˈspensəbl səˈpɔːrt

indispensable support

apoyo indispensable
Meaning
Essential assistance that cannot be done without; absolutely necessary help.
Example
Volunteers provide indispensable support to communities.
Los voluntarios proporcionan apoyo indispensable a las comunidades.
C1 noun /ɪnˈsaɪtmənt/

incitement

incitación
Meaning
the action of provoking unlawful or violent behavior
Example
He was arrested for incitement to riot.
Fue arrestado por incitación a la violencia.
C2 adjective /ˌɪn.ɪˈlʌk.tə.bəl/

ineluctable

inevitable
Meaning
Impossible to avoid or escape; inevitable.
Example
Death is an ineluctable part of human existence.
C1 verb /ɪnˈtruːd/

intrude

interrumpir
Meaning
To enter a place or situation where one is not wanted or not invited.
Example
He felt embarrassed to intrude on their private conversation.
Él se sintió avergonzado de interrumpir su conversación privada.
A2 verb /ɪnˈkluːd/

include

incluir
Meaning
to have as part of a whole; to contain or comprise
Example
The price includes all taxes.
El precio incluye todos los impuestos.
C1 adjective ˌɪn.krəˈmen.təl

incremental

incremental
Meaning
Relating to or denoting an increase or addition, especially one of a series on a fixed scale; proceeding in small stages.
Example
Incremental changes ensure sustainability.
Los cambios incrementales aseguran la sostenibilidad.
B2 verb /ˈɪnəveɪt/

innovate

innovar
Meaning
To introduce new methods, ideas, or products.
Example
The company must innovate to stay ahead of its competitors.
La empresa debe innovar para mantenerse por delante de sus competidores.
B2 noun ɪˈmjuː.nɪ.ti

immunity

inmunidad
Meaning
The ability of an organism to resist a particular infection or toxin by the action of specific antibodies.
Example
A strong immunity protects against infections.
Una fuerte inmunidad protege contra infecciones.
B1 noun ɪmˈpruːv.mənts

improvements

mejoras
Meaning
The action of making or becoming better; an instance of something becoming or being made better.
Example
Continuous improvements increase productivity.
Las mejoras continuas aumentan la productividad.
C2 adjective /ɪnˈsɪpiənt/

incipient

incipiente
Meaning
in an initial stage; beginning to develop
Example
The incipient storm made the sky turn dark and heavy.
La tormenta incipiente hizo que el cielo se volviera oscuro y pesado.