indefinitely
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C1 adverb /ɪnˈdɛfɪnətli/

indefinitely

indefinidamente
Meaning
for an unlimited or unspecified period of time
Example
The project has been postponed indefinitely.
El proyecto ha sido pospuesto indefinidamente.
A2 noun /ˌɪn.trəˈdʌk.ʃən/

introduction

introducción
Meaning
the action of introducing something or someone; an opening or beginning part
Example
The professor gave a brief introduction before starting the lecture.
El profesor dio una breve introducción antes de comenzar la conferencia.
C1 noun /ɪnˈdʌstriəsnəs/

industriousness

diligencia
Meaning
The quality of being hardworking and diligent.
Example
His industriousness earned him a promotion at work.
Su diligencia le valió una promoción en el trabajo.
C1 adjective /ɪnˈhɪbɪtɪd/

inhibited

inhibido
Meaning
Unable to act in a relaxed and natural way, especially due to self-consciousness or restraint.
Example
He was too inhibited to express his true feelings.
Él estaba demasiado inhibido para expresar sus verdaderos sentimientos.
C1 adjective /ɪmˈpæsɪv/

impassive

impasible
Meaning
Not showing or feeling emotion; expressionless.
Example
Despite the shocking news, she remained impassive.
A pesar de las noticias impactantes, ella permaneció impasible.
C2 adjective /ˌɪrɪˈfrændʒɪbəl/

irrefrangible

irrefrenable
Meaning
Not to be broken, violated, or infringed
Example
The constitution guarantees certain irrefrangible rights to every citizen.
La constitución garantiza ciertos derechos irrefrenables a cada ciudadano.
C1 verb ɪˈnɔː.ɡjə.reɪ.tɪd

inaugurated

inaugurado
Meaning
Begin or introduce (a system, policy, or period) formally.
Example
The organization was inaugurated officially.
La organización fue inaugurada oficialmente.
B2 noun /ɪnˈtɪəriər/

interior

interior
Meaning
the inside part of something; inner area of a place or object
Example
The interior of the hotel was beautifully decorated.
El interior del hotel estaba bellamente decorado.
C2 adjective /ˌɪnsəˈpɔːrtəbl̩/

insupportable

insuportable
Meaning
Too extreme or difficult to be endured.
Example
The heat was insupportable during the long journey.
El calor era insoportable durante el largo viaje.
C1 noun /aɪl/

isle

pequeña isla
Meaning
A small island or peninsula, often poetic or literary.
Example
They spent their honeymoon on a beautiful tropical isle.
Pasaron su luna de miel en una hermosa isla tropical.
B1 noun /ɪˌmædʒ.ɪˈneɪ.ʃən/

Imagination

imaginación; facultad creativa
Meaning
the faculty or action of forming new ideas or images not present to the senses; creative thinking
Example
Children's imagination allows them to turn a cardboard box into a spaceship or castle.
La imaginación de los niños les permite convertir una caja de cartón en una nave espacial o castillo.
B2 noun ˈɪndɪkeɪtə

indicator

indicador
Meaning
A thing that indicates the state or level of something.
Example
The unemployment rate is a key indicator of economic health.
La tasa de desempleo es un indicador clave de la salud económica.
B2 adjective /ɪnˈkluːsɪv/

inclusive

inclusivo
Meaning
Including all the services, facilities, or items normally expected or required; not excluding any section of society or any party involved.
Example
Inclusive growth benefits all sections of society.
El crecimiento inclusivo beneficia a todas las secciones de la sociedad.
C2 noun /ɪmˈpaɪ.ə.ti/

Impiety

impiedad
Meaning
lack of piety or reverence, especially for a god; disrespect or irreverence toward religious matters
Example
His impiety shocked the religious community when he mocked their sacred ceremonies.
Su impiedad sorprendió a la comunidad religiosa cuando se burló de sus ceremonias sagradas.
C1 adjective /ɪnˈtɒl.ər.ə.bəl/

Intolerable

intolerable
Meaning
unable to be endured; extremely unpleasant or painful
Example
The noise from the construction site was intolerable.
El ruido de la obra de construcción era intolerable.
A1 preposition /ˈɪntuː/

into

adentro
Meaning
expressing movement or direction to the inside of something
Example
She walked into the room quietly.
Ella entró silenciosamente en la habitación.
B2 adjective /ˌɪnɪˈfɪʃənt/

Inefficient

ineficiente
Meaning
not achieving maximum productivity; wasteful of time or resources
Example
The old computer system was inefficient and wasted a lot of time.
El sistema de computadoras antiguo era ineficiente y desperdiciaba mucho tiempo.
C2 noun /ɪmˈpruː.dəns/

Imprudence

imprudencia; descuido; temeridad
Meaning
the quality of being imprudent; lack of care for consequences; recklessness
Example
His financial imprudence led to bankruptcy within just two years.
Su imprudencia financiera llevó a la quiebra en solo dos años.
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.
C1 adjective /ɪmˈpoʊzɪŋ/

imposing

imponente
Meaning
having an appearance that is grand, impressive, or commanding
Example
The castle is an imposing structure overlooking the valley.
El castillo es una estructura imponente que domina el valle.
C1 adjective /ɪnˈvɛntɪv/

inventive

inventivo
Meaning
Having the ability to create or design new things or to think originally.
Example
The inventor was known for his inventive solutions to everyday problems.
El inventor era conocido por sus soluciones inventivas para los problemas cotidianos.
C1 noun /ˌɪnkəmˈpliːtnəs/

incompleteness

incompletitud
Meaning
the state of not being complete or whole; lack of necessary parts or fullness
Example
The incompleteness of the report caused delays in the project.
La incompletitud del informe causó retrasos en el proyecto.
C1 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

daño irreversible
Meaning
Harm or injury that cannot be undone or repaired.
Example
Climate change causes irreversible damage to ecosystems.
El cambio climático causa daño irreversible a los ecosistemas.
C1 noun /ˌɪnkjʊˈbeɪʃən/

incubation

el proceso de mantener huevos, células u organismos en las condiciones adecuadas para su desarrollo
Meaning
the process of keeping eggs, cells, or organisms in the right conditions for development
Example
The incubation of the eggs lasted for three weeks.
La incubación de los huevos duró tres semanas.
C1 noun /aɪˈdiː.ə.lɪ.zəm/

Idealism

Idealismo
Meaning
the pursuit of high principles and noble goals; unrealistic pursuit of perfection
Example
His youthful idealism motivated him to join various social justice movements.
Su idealismo juvenil lo motivó a unirse a varios movimientos de justicia social.
B2 noun /ɪnˈtɒlərəns/

intolerance

intolerancia
Meaning
unwillingness to accept or endure beliefs, behaviors, or conditions different from one's own
Example
The leader was criticized for his intolerance toward other religions.
El líder fue criticado por su intolerancia hacia otras religiones.
B2 noun /ˌaɪ.səˈleɪ.ʃən/

Isolation

aislación
Meaning
the process or fact of isolating or being isolated; separation from other people or things
Example
The patient was kept in isolation to prevent the spread of the infectious disease.
El paciente fue mantenido en aislamiento para prevenir la propagación de la enfermedad infecciosa.
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.
C1 adverb /ɪnˈvɜːrs.li/

Inversely

inversamente; en sentido opuesto
Meaning
in a way that is opposite or contrary; in reverse order or manner
Example
The price of goods is inversely related to their availability in the market.
El precio de los productos está inversamente relacionado con su disponibilidad en el mercado.
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.
B2 adjective /ɪnˈækjərət/

Inaccurate

incorrecto; erróneo; equivocado
Meaning
not correct; containing errors; wrong
Example
The weather forecast was inaccurate yesterday.
El pronóstico del tiempo estuvo incorrecto ayer.
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.
B2 noun /ˌɪnsɪˈkjʊərɪti/

insecurity

inseguridad
Meaning
lack of confidence or assurance; a state of uncertainty or vulnerability
Example
Her insecurity made her doubt her abilities despite her experience.
Su inseguridad la hizo dudar de sus habilidades.
C2 noun /ɪnˈtɒksɪkənt/

intoxicant

intoxicante
Meaning
a substance, especially alcohol or a drug, that causes intoxication
Example
Alcohol is the most commonly used intoxicant in many cultures.
El alcohol es el intoxicante más comúnmente usado en muchas culturas.
C2 noun /ˌɪkθiˈɒlədʒɪst/

ichthyologist

icthyólogo
Meaning
A scientist who studies fish.
Example
The ichthyologist discovered a new species of fish in the river.
El icthyólogo descubrió una nueva especie de pez en el río.
C1 verb /ɪmˈplɔːr/

implore

implorar
Meaning
To beg someone earnestly or desperately to do something.
Example
She implored him to stay with her.
Ella le imploró que se quedara con ella.
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 noun /ˌɪmprəˈsɑːrioʊ/

impresario

productor
Meaning
A person who organizes or finances concerts, plays, or operas.
Example
The impresario arranged a series of concerts for the rising star.
El impresario organizó una serie de conciertos para la estrella emergente.
B2 adjective /ˌɪrɪˈzɪstəbəl/

Irresistible

irresistible
Meaning
too attractive and tempting to be resisted; impossible to resist
Example
The chocolate cake was absolutely irresistible.
El pastel de chocolate era absolutamente irresistible.
B2 adjective /ˌɪnkənˈviːniənt/

Inconvenient

inconveniente; molesto; problemático
Meaning
causing trouble, difficulties, or discomfort; awkward; troublesome
Example
The broken elevator made it inconvenient to reach the top floor.
El ascensor roto hizo que fuera inconveniente llegar al último piso.
C1 adjective ɪmˈpɛkəbl

impeccable

impecable
Meaning
In accordance with the highest standards; faultless.
Example
His impeccable taste in fashion was admired by all his peers.
Su impecable gusto en la moda fue admirado por todos sus compañeros.
C2 adjective /ˌɪnkəˈməʊdiəs/

incommodious

incómodo
Meaning
Uncomfortably small, cramped, or inconvenient.
Example
We had to stay in an incommodious room during the trip.
Tuvimos que quedarnos en una habitación incómoda durante el viaje.
C2 adjective /ˌɪrɪˈprəʊtʃəbl̩/

irreproachable

intachable
Meaning
Beyond criticism; faultless.
Example
The judge was known for his irreproachable integrity.
El juez era conocido por su integridad intachable.
B2 adjective /ˌɪnəˈproʊpriət/

inappropriate

inapropiado
Meaning
not suitable or proper in the circumstances
Example
It was inappropriate to talk loudly in the library.
Era inapropiado hablar en voz alta en la biblioteca.
B1 noun ˈɪn.də.stri

industry

industria
Meaning
Economic activity concerned with the processing of raw materials and manufacture of goods in factories.
Example
The industry focuses on luxury experiences.
La industria se enfoca en experiencias de lujo.
B2 adjective /ɪˈmætʃʊr/

Immature

inmaduro; inmaduro emocionalmente; infantil
Meaning
not fully developed; lacking emotional or intellectual development; childish
Example
His immature behavior during the meeting disappointed everyone.
Su comportamiento inmaduro durante la reunión decepcionó a todos.
A2 noun /ɪŋk/

Ink

tinta
Meaning
a colored fluid used for writing, drawing, or printing; a dark liquid ejected by cuttlefish
Example
The old fountain pen leaked ink all over his white shirt during the meeting.
El viejo bolígrafo perdió tinta por toda su camisa blanca durante la reunión.
C2 noun /ɪnˌtɛl.ɪˈdʒɛntsi.ə/

intelligentsia

intelectuales
Meaning
The group of people engaged in intellectual and cultural pursuits in a society.
Example
The intelligentsia played a key role in shaping public opinion.
Los intelectuales jugaron un papel clave en la formación de la opinión pública.
C1 verb /ɪmˈpɛl/

impel

impulsar
Meaning
to drive, force, or urge someone to do something
Example
Her curiosity impelled her to open the mysterious box.
Su curiosidad la impulsó a abrir la caja misteriosa.
C1 adjective /ɪmˈpɜːrtɪnənt/

impertinent

impertinente
Meaning
rude and showing a lack of respect
Example
It was impertinent of him to question the manager's decision.
Fue impertinente de su parte cuestionar la decisión del gerente.
B2 noun /ˈɪɡ.nər.əns/

Ignorance

ignorancia
Meaning
lack of knowledge or information; the state of being uninformed about something
Example
His ignorance about basic computer skills made it difficult for him to find a job.
Su ignorancia sobre habilidades básicas de computación le dificultó encontrar un trabajo.
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.
B2 noun /ɪnˈhæbɪtənt/

inhabitant

habitante
Meaning
a person or animal that lives in a particular place
Example
The inhabitants of the village rely on farming for their livelihood.
Los habitantes del pueblo dependen de la agricultura para su sustento.
C1 adjective /ɪnˈkɒmpɪtənt/

incompetent

incompetente
Meaning
Lacking the necessary ability or skills to do something successfully.
Example
He was fired because he was incompetent at his job.
Lo despidieron porque era incompetente en su trabajo.
B2 verb /ˈɪmɪteɪt/

imitate

imitar
Meaning
to copy the behavior or manner of someone or something
Example
Children often imitate their parents' behavior.
Los niños a menudo imitan el comportamiento de sus padres.
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.
B2 verb /ɪnˈhæbɪt/

inhabit

habitar
Meaning
to live in; to occupy as a dwelling
Example
Many animals inhabit the forest.
Muchos animales habitan el bosque.
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.
B2 noun ˈɪnəveɪtɪv tuːlz

innovative tools

herramientas innovadoras
Meaning
Creative devices or advanced technologies that introduce new methods or approaches to accomplish tasks.
Example
Teachers use innovative tools to enhance classroom learning.
Los maestros utilizan herramientas innovadoras para mejorar el aprendizaje en el aula.
C2 verb /ˈɪntərˌdɪkt/

interdict

prohibir
Meaning
to prohibit or forbid something by authoritative order, often by law or decree
Example
The court moved to interdict the sale of the illegal goods.
El tribunal se movió para prohibir la venta de los bienes ilegales.
C1 adjective /ˌɪnˌkɒnsɪˈkwɛnʃəl/

inconsequential

insignificante
Meaning
Not important or significant; too small to matter.
Example
The mistake was minor and inconsequential.
El error fue menor e insignificante.
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.
B2 adjective /ɪˈmjuːn/

immune

inmunizado
Meaning
protected from disease or from the effects of something
Example
Children who are vaccinated are immune to many diseases.
Los niños vacunados están inmunizados contra muchas enfermedades.
B2 noun /ˈaɪ.dəl/

Idol

ídolo; persona admirada
Meaning
an image or representation of a god used as an object of worship; a person who is greatly admired
Example
The singer became a teenage idol after her hit song topped the charts worldwide.
La cantante se convirtió en un ídolo adolescente después de que su canción de éxito llegara a la cima de las listas de éxitos mundiales.
A1 conjunction /ɪf/

if

si
Meaning
used to introduce a condition or supposition
Example
If it rains tomorrow, we will stay home.
Si llueve mañana, nos quedaremos en casa.
C1 adjective /ˌɪnstənˈteɪniəs/

instantaneous

instantáneo
Meaning
Happening immediately, without any delay.
Example
The change in temperature was almost instantaneous.
El cambio de temperatura fue casi instantáneo.
C2 noun /ɪmˈpɒs.tʃər/

Imposture

engaño; fraude; impostura
Meaning
the practice of deceiving others by pretending to be someone else; fraudulent deception
Example
The elaborate imposture lasted for months before investigators uncovered the truth.
La elaborada impostura duró meses antes de que los investigadores descubrieran la verdad.
B2 noun /ɪnˈvɒlvmənt/

involvement

participación
Meaning
the act of taking part in something
Example
His involvement in the project was crucial.
Su participación en el proyecto fue crucial.
B2 noun ɪˈlɪtərəsi

illiteracy

analfabetismo
Meaning
The inability to read and write; lack of education or knowledge in a particular area.
Example
Illiteracy often leads to poverty and unemployment.
El analfabetismo a menudo conduce a la pobreza y el desempleo.
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 adjective /ɪmˈpɜːrviəs/

impervious

impermeable
Meaning
Not allowing fluid to pass through; unable to be affected by something.
Example
The jacket is impervious to rain.
La chaqueta es impermeable a la lluvia.
C1 adjective ɪnˈsaɪ.sɪv

incisive

incisivo
Meaning
Intelligently analytical and clear-thinking; showing clear thought and good understanding of what is important.
Example
His incisive comments revealed the core issues.
Sus comentarios incisivos revelaron los problemas clave.
C1 verb /ɪnˈhɪbɪt/

inhibit

inhibir
Meaning
to prevent or restrain someone or something from acting freely; to hinder
Example
Fear can inhibit personal growth.
El miedo puede inhibir el crecimiento personal.
B2 adjective /ɪnˈtɒlərənt/

intolerant

intolerante
Meaning
unwilling to accept or respect beliefs or behavior different from one's own
Example
He is intolerant of any opinion that differs from his own.
Él no tolera ninguna opinión que difiera de la suya.
B1 adjective /ɪnˈtɜːrnəl/

internal

interno
Meaning
situated inside; relating to the inside or inner part of something
Example
The company is conducting an internal audit this month.
La empresa está realizando una auditoría interna este mes.
C1 noun /ɪnˈkɒmpɪtəns/

incompetence

incompetencia
Meaning
Lack of ability, skill, or effectiveness in doing something.
Example
The project failed due to the manager’s incompetence.
El proyecto fracasó debido a la incompetencia del gerente.
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 /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.
B2 verb /ˈaɪ.sə.leɪt/

isolate

aislar
Meaning
To separate something or someone from others.
Example
Doctors tried to isolate the patient to prevent the spread of infection.
Los doctores intentaron aislar al paciente para evitar la propagación de la infección.
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.
B1 adjective /ˈɪnər/

inner

interno
Meaning
Located inside or closer to the center; relating to one’s thoughts or feelings.
Example
She shared her inner thoughts with her best friend.
Ella compartió sus pensamientos internos con su mejor amiga.
C2 adjective /ɪmˈpɔːrtʃənət/

importunate

importuno
Meaning
Persistent to the point of annoyance or intrusion
Example
The importunate salesman kept calling despite repeated refusals.
El vendedor importuno siguió llamando a pesar de las repetidas negativas.
C1 noun /ˈɪrɪtənt/

irritant

sustancia irritante
Meaning
something that causes irritation or discomfort
Example
Dust is a common irritant for people with allergies.
El polvo es un irritante común para las personas con alergias.
C1 adjective /ˌɪn.dɪˈspen.sə.bəl/

indispensable

indispensable
Meaning
Absolutely necessary, essential
Example
Water is indispensable for human survival.
El agua es indispensable para la supervivencia humana.
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.
C1 adjective /ɪnˈdɪɡnənt/

indignant

indignado
Meaning
Feeling or showing anger at something considered unfair or unjust.
Example
She was indignant when accused of cheating.
Ella estaba indignada cuando la acusaron de hacer trampa.
B2 adjective /ɪnˈfɔːrmətɪv/

Informative

informativo
Meaning
giving or providing useful information; educational; instructive
Example
The documentary was very informative and educational.
El documental fue muy informativo y educativo.
B1 verb /aɪˈdentɪfaɪ/

identify

identificar
Meaning
to recognize; to establish who someone is
Example
Can you identify the suspect?
¿Puedes identificar al sospechoso?
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.
C1 noun /ɪnˈfɜːməri/

infirmary

hospital
Meaning
A hospital or place where the sick or injured are cared for.
Example
The school had an infirmary for minor injuries.
La escuela tenía un hospital para lesiones menores.
C2 adjective /ˌɪlˈneɪ.tʃəd/

ill-natured

de mal carácter
Meaning
Having a bad or unpleasant character; unkind or malicious.
Example
He made an ill-natured remark about his colleague.
Hizo un comentario de mal carácter sobre su colega.
C1 noun /ˌɪnfɪˈdɛləti/

infidelity

infidelidad
Meaning
the act of being unfaithful to a spouse or partner
Example
Their marriage ended due to his infidelity.
Su matrimonio terminó debido a su infidelidad.
B1 adjective /ɪnˈfɔːrməl/

Informal

informal; relajado; casual
Meaning
relaxed and friendly; not official or ceremonial; casual
Example
The meeting was informal and relaxed.
La reunión fue informal y relajada.
C2 noun /ˌɪnjuːˈɛndəʊ/

innuendo

indirecta
Meaning
An allusive or oblique remark or hint, typically a suggestive or disparaging one.
Example
The manager's innuendo was directed towards his competitor.
La indirecta del gerente fue dirigida hacia su competidor.
C1 verb /ɪnˈvɜːrt/

invert

invertir
Meaning
To turn something upside down or in the opposite position, order, or direction.
Example
He inverted the glass to let the water drain out.
Él invirtió el vaso para dejar que el agua se drenara.
B2 verb /ɪnˈheɪl/

inhale

inhalar
Meaning
to breathe in; to draw air into the lungs
Example
Take a deep breath and inhale slowly.
Toma una respiración profunda e inhala lentamente.
B2 adjective /ɪˈreɡjələr/

irregular

irregular
Meaning
not even or consistent in shape, pattern, time, or behavior; not following normal rules
Example
His attendance at work has been irregular this month.
Su asistencia al trabajo ha sido irregular este mes.
B2 adjective /ɪˈlɪt.ər.ət/

Illiterate

analfabeto; iletrado; ignorante
Meaning
unable to read or write; lacking education
Example
The program aims to help illiterate adults learn to read and write.
El programa tiene como objetivo ayudar a los adultos analfabetos a aprender a leer y escribir.
C1 noun (plural) /ˈɪndɪˌsiːz/

indices

índices
Meaning
plural form of index; statistical measures or reference points used for comparison
Example
Stock market indices fell sharply after the announcement.
Los índices del mercado de valores cayeron drásticamente después del anuncio.
C1 adjective /ˌɪndɪˈspjuːtəbəl/

Indisputable

indiscutible; innegable; cierto
Meaning
impossible to deny or argue against; undeniable; certain
Example
The evidence against him was indisputable.
La evidencia en su contra era indiscutible.
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.
B1 noun aɪˈdɛntɪti

identity

identidad
Meaning
The fact of being who or what a person or thing is; the characteristics determining who or what a person or thing is.
Example
The day reinforces our national identity.
El día refuerza nuestra identidad nacional.
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 /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.
C1 adjective /ɪˈmeʒərəbəl/

Immeasurable

inconmensurable
Meaning
too large or extensive to measure; boundless
Example
The immeasurable love of a mother knows no bounds.
El amor inconmensurable de una madre no tiene límites.
B2 verb /ɪnˈʃʊər/

insure

asegurar
Meaning
to provide insurance; to make certain
Example
I need to insure my new car.
Necesito asegurar mi coche nuevo.
C1 verb /ɪnˈklaɪn/

incline

inclinarse
Meaning
to feel willing or favorably disposed toward something; to bend or tilt
Example
She is inclined to agree with the proposal.
Ella está inclinada a estar de acuerdo con la propuesta.
B2 adjective/noun /ɪˈrɑːki/

iraqi

iraquí
Meaning
relating to Iraq or its people
Example
The Iraqi culture is rich and diverse.
La cultura iraquí es rica y diversa.
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 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.
B2 noun /ɪnˈfɪnɪti/

infinity

infinito
Meaning
A concept describing something without any limit or end.
Example
The universe seems to stretch into infinity.
El universo parece extenderse hacia el infinito.
C1 noun /ɪmˈpɛdɪmənt/

impediments

obstáculos
Meaning
A hindrance or obstruction in doing something; things that prevent progress or achievement.
Example
Economic impediments often hinder social development.
Los obstáculos económicos a menudo dificultan el desarrollo social.
C1 noun /ɪnˈkɜːrʒən/

incursion

incursión
Meaning
A sudden attack or invasion into a place or territory.
Example
The army repelled the enemy incursion at the border.
El ejército repelió la incursión enemiga en la frontera.
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.
C1 adjective /ˈɪrɪtəbl/

irritable

irritable
Meaning
easily annoyed or made angry
Example
She became irritable after working long hours without rest.
Ella se volvió irritable después de trabajar muchas horas sin descanso.
C2 adjective /ˌaɪ.kə.nəˈklæs.tɪk/

iconoclastic

caracterizado por atacar o rechazar creencias, tradiciones o valores establecidos
Meaning
Characterized by attacking or rejecting cherished beliefs, traditions, or established values.
Example
Her iconoclastic views challenged the conventional wisdom of the industry.
Sus puntos de vista iconoclásticos desafiaron la sabiduría convencional de la industria.
B2 noun /ˈɪn.flu.ən.sər/

Influencer

influenciador, persona que promueve productos
Meaning
A person with the ability to influence potential buyers of a product or service by promoting or recommending the items on social media.
Example
Social media influencers shape consumer preferences.
Los influencers de las redes sociales moldean las preferencias de los consumidores.
C1 noun /ˌɪnkɑːrˈneɪʃən/

incarnation

encarnación
Meaning
the embodiment of a deity, spirit, or quality in a physical form
Example
The monk was considered the incarnation of compassion.
El monje fue considerado la encarnación de la compasión.
C1 adjective /ɪmˈpɑːrʃəl/

Impartial

imparcial; neutral
Meaning
treating all sides fairly; unbiased; neutral
Example
A good judge must remain impartial throughout the trial.
Un buen juez debe mantenerse imparcial durante todo el juicio.
C1 adjective ˌɪm.pəˈsɛp.tɪ.bəl

imperceptible

imperceptible
Meaning
So subtle or gradual that it is difficult to notice or perceive
Example
The changes in his behavior were imperceptible at first.
Los cambios en su comportamiento eran imperceptibles al principio.