intonation
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C1 noun ˌɪn.toʊˈneɪ.ʃən

intonation

entonación
Meaning
The rise and fall of tone in speech and pronunciation.
Example
Proper intonation enhances the clarity of a speech.
Una buena entonación mejora la claridad de un discurso.
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.
C1 noun /ˈɪn.tə.mə.si/

Intimacy

intimidad; cercanía
Meaning
close familiarity or friendship; closeness; a private cozy atmosphere
Example
The couple valued the emotional intimacy they shared more than material possessions.
La pareja valoró más la intimidad emocional que compartieron que las posesiones materiales.
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.
C1 noun ɪnˈsɒl.vən.si

insolvency

insolvencia
Meaning
The state of being unable to pay debts owed; bankruptcy.
Example
The company declared insolvency after years of losses.
La empresa declaró la insolvencia después de años de pérdidas.
C1 noun /ˌɪndɪˈdʒɛstʃən/

indigestion

indigestión
Meaning
Discomfort or pain in the stomach associated with difficulty in digesting food.
Example
He avoided spicy food because it often gave him indigestion.
Él evitó la comida picante porque a menudo le provocaba indigestión.
C1 noun /ˌɪnkoʊˈhɪrəns/

incoherence

incoherencia
Meaning
The quality of being unclear, confused, or lacking logical connection.
Example
His speech was full of incoherence and difficult to follow.
Su discurso estaba lleno de incoherencias y era difícil de seguir.
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.
C1 adjective /ˌɪndɪˈstɪŋkt/

indistinct

indistinto
Meaning
Not clear or sharply defined; vague or blurred.
Example
The sound of voices was indistinct in the distance.
El sonido de las voces era indistinto a lo lejos.
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 /ɪnˈseɪʃəbl̩/

insatiable

insaciable
Meaning
impossible to satisfy; always wanting more
Example
Her insatiable curiosity drove her to read every book in the library.
Su insaciable curiosidad la llevó a leer todos los libros de la biblioteca.
C1 adjective /ˌɪmprɪˈsaɪs/

imprecise

impreciso
Meaning
Not exact or accurate; vague.
Example
His explanation was too imprecise to be helpful.
Su explicación era demasiado imprecisa para ser útil.
C1 adjective /ɪnˈtrɛpɪd/

intrepid

intrépido
Meaning
fearless and adventurous, often used humorously
Example
The intrepid traveler explored the jungle alone.
El intrépido viajero exploró la jungla solo.
C1 noun /ɪnˈɛk.wɪ.ti/

inequity

inequidad
Meaning
Lack of fairness or justice; unequal distribution or treatment.
Example
Social inequity continues to be a global issue.
La inequidad social sigue siendo un problema global.
C1 noun /ˈɪntərˌpleɪ/

interplay

interacción
Meaning
The way in which two or more things have an effect on each other.
Example
The interplay between culture and technology shapes modern life.
La interacción entre la cultura y la tecnología moldea la vida moderna.
C1 noun /ɪnˌtɪmɪˈdeɪʃən/

intimidation

intimidación
Meaning
The action of frightening or threatening someone to make them do something.
Example
The workers reported cases of intimidation by the management.
Los trabajadores informaron casos de intimidación por parte de la administración.
C1 adjective /ɪmˈpjʊər/

Impure

impuro
Meaning
contaminated; not clean; mixed with foreign substances
Example
The impure water caused health problems in the village.
El agua impura causó problemas de salud en el pueblo.
C1 adjective /ɪnˈkɒŋɡruəs/

incongruous

incongruente
Meaning
Not fitting in with or suitable for the surroundings.
Example
His jokes were incongruous during the serious meeting.
Sus chistes fueron incongruentes durante la reunión seria.
C1 adjective /ɪnˈsʌf.ər.ə.bəl/

insufferable

insoportable
Meaning
Too extreme to bear; intolerable.
Example
The heat during the summer was insufferable.
El calor durante el verano fue insoportable.
C1 adjective ɪnˈtrɪn.zɪk

intrinsic

intrínseco, esencial, natural
Meaning
Belonging naturally; essential. Existing as a natural or basic part of something.
Example
Creativity is an intrinsic quality of a great artist.
La creatividad es una cualidad intrínseca de un gran artista.
C1 noun /ɪnˈfɜː.mə.ti/

Infirmity

debilidad; enfermedad; fraqueza
Meaning
physical or mental weakness; a disease or ailment; frailty
Example
Despite his advanced age and various infirmities, he remained mentally sharp and alert.
A pesar de su avanzada edad y varias enfermedades, se mantuvo mentalmente agudo y alerta.
C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

irregularidad
Meaning
lack of regularity or consistency; a deviation from what is normal, expected, or orderly
Example
The audit revealed several financial irregularities in the company’s records.
La auditoría reveló varias irregularidades financieras en los registros de la empresa.
C1 verb /ɪnˈfleɪt/

inflate

inflar
Meaning
to fill with air or gas so it expands; to increase excessively or artificially
Example
The mechanic inflated the tire to the correct pressure.
El mecánico infló el neumático a la presión correcta.
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 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.
C1 noun /ˌɪmɔːrˈtæləti/

immortality

inmortalidad
Meaning
the state of living forever; eternal life or lasting fame beyond death
Example
Many ancient cultures believed that heroes could achieve immortality through great deeds.
Muchas culturas antiguas creían que los héroes podían alcanzar la inmortalidad mediante grandes hazañas.
C1 adjective /ˌɪnədˈvaɪzəbl/

inadvisable

desaconsejable
Meaning
Not recommended; likely to have undesirable consequences.
Example
It is inadvisable to drive in such heavy rain.
No es recomendable conducir bajo tal lluvia intensa.
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.
C1 noun /ɪnˈdjuːsmənt/

inducement

inducido
Meaning
something that persuades or encourages someone to do something
Example
The company offered a bonus as an inducement to employees.
La empresa ofreció un bono como incentivo para los empleados.
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 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.
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.
C1 noun /ɪnˈhɛrɪtər/

inheritor

heredero
Meaning
a person who receives money, property, or a title when someone dies
Example
She became the inheritor of her family's estate.
Ella se convirtió en la heredera de la propiedad de su familia.
C1 noun ɪnˌɛv.ɪ.təˈbɪl.ɪ.ti

inevitability

inevitabilidad
Meaning
The quality of being certain to happen and impossible to avoid or prevent.
Example
The inevitability of change is a part of life.
La inevitabilidad del cambio es parte de la vida.
C1 noun /ˌɪnklɪˈneɪʃən/

inclination

inclinación
Meaning
A natural tendency or urge to act or feel in a particular way.
Example
She has an inclination towards helping others.
Ella tiene una inclinación hacia ayudar a los demás.
C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

inexcusable
Meaning
Too bad to be justified or overlooked; unforgivable.
Example
His rude behavior was inexcusable.
Su comportamiento grosero era inexcusable.
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.
C1 noun /ɪnˈsek.tɪ.saɪd/

Insecticide

insecticida
Meaning
a substance used for killing insects; a chemical pesticide that targets insects
Example
The farmer sprayed insecticide on his crops to protect them from harmful bugs.
El agricultor roció insecticida en sus cultivos para protegerlos de los insectos dañinos.
C1 adjective /ɪˈnɛpt/

inept

inepto
Meaning
lacking skill or ability; clumsy or incompetent
Example
His inept handling of the situation made it worse.
Su manejo inepto de la situación lo empeoró.
C1 adjective /ɪnˈedəbəl/

Inedible

incomible
Meaning
not suitable or safe for eating; not edible
Example
The mushrooms were poisonous and completely inedible.
Los hongos eran venenosos y completamente incomestibles.
C1 adjective /ɪˈrɛvəkəbl/

irrevocable

irreversible
Meaning
Not able to be revoked, changed, or undone.
Example
She made an irrevocable decision to leave the company.
Ella tomó una decisión irreversible de dejar la empresa.
C1 noun /ˌɪmpɔːrˈteɪʃən/

importation

importación
Meaning
The act of bringing goods or services into a country from abroad
Example
The importation of luxury goods is strictly regulated.
La importación de productos de lujo está estrictamente regulada.
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.
C1 adjective ɪnˈkʌm.bənt

incumbent

obligatorio
Meaning
necessary for (someone) as a duty or responsibility.
Example
It is incumbent upon all citizens to obey the law.
Es obligatorio para todos los ciudadanos obedecer la ley.
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.
C1 adjective /ɪˈnɒkjuəs/

innocuous

inofensivo
Meaning
Not harmful or offensive.
Example
His remark was completely innocuous and not meant to offend anyone.
Su comentario fue completamente inofensivo y no tenía la intención de ofender a nadie.
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.
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 noun /ɪˈnɜː.ʃə/

Inertia

inercia; falta de actividad
Meaning
a tendency to do nothing or remain unchanged; lack of activity or movement
Example
The team's inertia prevented them from adapting to the rapidly changing market conditions.
La inercia del equipo les impidió adaptarse a las condiciones de mercado en rápido cambio.
C1 verb /ɪnˈdʌkt/

induct

admitir formalmente a alguien en una posición, organización o cargo
Meaning
to formally admit someone into a position, organization, or office
Example
She was inducted into the university's honor society.
Ella fue admitida en la sociedad de honor de la universidad.
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.
C1 adjective /ˈɪnfəməs/

infamous

infame
Meaning
well known for some bad quality or deed
Example
The dictator was infamous for his cruelty.
El dictador era infame por su crueldad.
C1 adjective /ˈɪnərmoʊst/

Innermost

más profundo; más personal
Meaning
most private and secret; deepest; most personal
Example
She shared her innermost feelings with her closest friend.
Ella compartió sus sentimientos más profundos con su amigo más cercano.
C1 verb /ɪnˈdaɪt/

indict

acusar
Meaning
to formally accuse someone of committing a serious crime
Example
The grand jury decided to indict the politician for corruption.
El gran jurado decidió acusar al político por corrupción.
C1 adjective /ɪnˈdetɪd/

Indebted

endeudado; agradecido
Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
Estoy profundamente endeudado con mi profesora por toda su orientación.
C1 adjective, noun /ɪnˈdɪkətɪv/

indicative

indicativo
Meaning
Serving as a sign or expression of something; in grammar, a mood used to make factual statements.
Example
His tone was indicative of his frustration.
Su tono era indicativo de su frustración.
C1 noun /ɪˈreləvəns/

irrelevance

irrelevancia
Meaning
the quality of not being connected to or important for a particular matter; lack of significance
Example
His long explanation only highlighted the irrelevance of the details to the main issue.
Su larga explicación solo resaltó la irrelevancia de los detalles para el tema principal.
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 /ˌɪnsɪˈdɛntəl/

incidental

incidental
Meaning
happening as a minor part or in connection with something else
Example
Incidental expenses like snacks and tips were included in the bill.
Gastos incidentales como bocadillos y propinas fueron incluidos en la factura.
C1 noun /ˈɪn.floʊ/

inflow

flujo
Meaning
The movement of things such as money, people, or water into a place.
Example
The inflow of tourists boosted the local economy.
El flujo de turistas impulsó la economía local.
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.
C1 adjective ˌɪn.təˈmɪt.ənt

intermittent

intermitente
Meaning
Happening irregularly, not continuously.
Example
The rain was intermittent throughout the day.
La lluvia fue intermitente durante todo el día.
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 /ˌɪn.səbˈstæn.ʃəl/

insubstantial

insustancial
Meaning
Lacking strength, substance, or solidity.
Example
The evidence provided was insubstantial and unconvincing.
La evidencia proporcionada fue insustancial y poco convincente.
C1 adjective /ˌɪnəˈtɛntɪv/

inattentive

inattento
Meaning
not paying attention; lacking focus or concentration
Example
The inattentive student missed several important instructions.
El estudiante inattento perdió varias instrucciones importantes.
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 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.
C1 adjective /ɪnˈtræk.tə.bəl/

intractable

incontrolable
Meaning
Difficult or impossible to manage, control, or solve.
Example
The conflict has become an intractable problem.
El conflicto se ha convertido en un problema incontrolable.
C1 adjective ɪˈneɪt

Innate

innato o natural
Meaning
Existing from birth or natural
Example
She has an innate talent for music.
Ella tiene un talento innato para la música.
C1 adjective /ɪnˈfleɪtɪd/

inflated

inflado
Meaning
excessively increased in size, value, or importance; filled with air or gas
Example
The company faced criticism for its inflated prices.
La empresa enfrentó críticas por sus precios inflados.
C1 noun ˌɪnfɛsˈteɪʃən

infestation

infestación, gran número de insectos o animales en un lugar
Meaning
The presence of an unusually large number of insects or animals in a place, causing damage or disease.
Example
The infestation of ants in the kitchen led to immediate pest control measures.
La infestación de hormigas en la cocina llevó a medidas inmediatas de control de plagas.
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 noun /ɪmˈpɛd.ɪ.mənt/

impediment

obstáculo
Meaning
A hindrance or obstruction in doing something; something that prevents progress.
Example
Lack of funds is a major impediment to the project.
La falta de fondos es un gran obstáculo para el proyecto.
C1 adjective /ˌɪntərˈtwaɪnd/

intertwined

felicidad
Meaning
closely connected or twisted together
Example
Their lives became deeply intertwined after the accident.
Ella no pudo ocultar su felicidad cuando recibió el premio.
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.
C1 verb /ɪmˈbɛd/

imbed

incrustar
Meaning
To fix firmly or deeply in a surrounding mass.
Example
The journalist imbedded himself with the troops to report firsthand.
El periodista se incrustó con las tropas para reportar de primera mano.
C1 adjective /ɪnˈvɪnsəbl/

invincible

invencible
Meaning
too powerful to be defeated or overcome
Example
The team seemed invincible after winning ten matches in a row.
El equipo parecía invencible después de ganar diez partidos consecutivos.
C1 adjective /ɪˈluː.sɪv/

Illusive

ilusorio; que parece existir pero no es real; engañoso
Meaning
deceptive; appearing to exist but not real; misleading
Example
The promise of easy money proved to be illusive and misleading.
La promesa de dinero fácil resultó ser ilusoria y engañosa.
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.
C1 adjective /ɪˈnænɪmət/

inanimate

objeto inanimado
Meaning
not alive, especially not in the manner of animals and humans; lifeless
Example
The museum was full of inanimate objects from ancient times.
El museo estaba lleno de objetos inanimados de tiempos antiguos.
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 adjective /ɪnˈvɜːs/

Inverse

inverso; opuesto
Meaning
opposite in order, nature, or effect; reversed
Example
There is an inverse relationship between price and demand.
Existe una relación inversa entre el precio y la demanda.
C1 adjective /ˌɪnɪkˈsplɪkəbl/

inexplicable

inexplicable
Meaning
Impossible to explain or understand.
Example
The sudden disappearance of the file was inexplicable.
La repentina desaparición del archivo fue inexplicable.
C1 adjective /ɪˈnuːmərəbəl/

Innumerable

innumerable; incontable; infinito
Meaning
too many to be counted; countless; infinite in number
Example
There are innumerable stars in the night sky that we cannot see with our naked eyes.
Hay innumerables estrellas en el cielo nocturno que no podemos ver con nuestros ojos desnudos.
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.
C1 adjective /ɪˈmækjələt/

immaculate

inmaculado
Meaning
perfectly clean, neat, or free from flaws
Example
Her room was immaculate, with everything in its place.
Su habitación estaba inmaculada, con todo en su lugar.
C1 noun /ɪmˈbæl.əns/

Imbalance

desequilibrio
Meaning
lack of proportion or relation between corresponding things; unequal distribution
Example
The doctor said the patient's dizziness was caused by an inner ear imbalance.
El doctor dijo que el mareo del paciente fue causado por un desequilibrio en el oído interno.
C1 noun /ɪnˈsɒm.ni.ə/

Insomnia

insomnio
Meaning
habitual sleeplessness; inability to sleep; the condition of being unable to sleep
Example
Her chronic insomnia made it difficult for her to concentrate during work hours.
Su insomnio crónico le dificultaba concentrarse durante las horas de trabajo.
C1 adjective ɪˈluː.sər.i

illusory

ilusorio
Meaning
Based on illusion; not real although seeming to be.
Example
His sense of security was entirely illusory.
Su sensación de seguridad era completamente ilusoria.
C1 adjective /aɪˈdɪlɪk/

idyllic

idílico y hermoso
Meaning
Like an idyll; extremely happy, peaceful, or picturesque.
Example
They enjoyed an idyllic vacation by the sea.
Disfrutaron de unas vacaciones idílicas junto al mar.
C1 noun /ˌɪnsɪɡˈnɪfɪkəns/

insignificance

insignificancia
Meaning
The quality of being unimportant or trivial.
Example
He felt a sense of insignificance in the vast universe.
Él sintió un sentido de insignificancia en el vasto universo.
C1 adverb /ˌɪn.ədˈvɜːr.tənt.li/

Inadvertently

inadvertidamente; sin intención; por error
Meaning
without being aware of what you are doing; unintentionally; by mistake
Example
She inadvertently deleted the important file while cleaning her computer.
Ella eliminó accidentalmente el archivo importante mientras limpiaba su computadora.
C1 verb /ɪnˈsaɪt/

incite

incitar
Meaning
to provoke; to stir up
Example
His speech incited the crowd to violence.
Su discurso incitó a la multitud a la violencia.
C1 noun /ɪnˈsɜːʃən/

insertion

inserción
Meaning
the action of inserting something into something else
Example
The insertion of the new data was completed successfully.
La inserción de los nuevos datos se completó con éxito.
C1 adjective /ˈɪɡ.ni.əs/

igneous

ígnea
Meaning
Formed through the cooling and solidification of magma or lava.
Example
Granite is an igneous rock commonly used in construction.
El granito es una roca ígnea que se utiliza comúnmente en la construcción.
C1 adjective /ɪˈnɔːɡjərəl/

Inaugural

inaugural
Meaning
marking the beginning of something; first; opening
Example
The president delivered his inaugural speech.
El presidente dio su discurso inaugural.
C1 noun /ˈɪnstɪˌɡeɪtər/

instigator

instigador
Meaning
A person who brings about or initiates something, usually something bad.
Example
The police identified him as the instigator of the violence.
La policía lo identificó como el instigador de la violencia.
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.
C1 adjective /ɪnˈveɪsɪv/

invasive

invasivo
Meaning
Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.
Example
The doctor explained that the procedure was minimally invasive.
El doctor explicó que el procedimiento era mínimamente invasivo.
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 /ɪnˈvɑːlənˌtɛri/

involuntary

involuntario
Meaning
done without will or conscious control
Example
He gave an involuntary shiver when he heard the loud noise.
Él dio un escalofrío involuntario cuando escuchó el ruido fuerte.
C1 adjective /ˌɪn.səˈbɔːr.dɪ.nət/

insubordinate

insubordinado
Meaning
Defiant of authority; disobedient to orders.
Example
The insubordinate employee refused to follow the manager's instructions.
El empleado insubordinado se negó a seguir las instrucciones del gerente.
C1 adjective /ˌɪnkənˈsɪdərət/

inconsiderate

desconsiderado
Meaning
Thoughtless; showing a lack of concern for others.
Example
It was inconsiderate of him to play loud music late at night.
Fue desconsiderado de su parte poner música alta tarde en la noche.
C1 adjective /ɪnˈsɒlvənt/

insolvent

insolvente
Meaning
unable to pay debts owed
Example
The insolvent firm could not meet its financial obligations.
La empresa insolvente no pudo cumplir con sus obligaciones financieras.
C1 noun /ˈɪnˌmeɪt/

inmate

interno
Meaning
a person confined to an institution such as a prison or hospital
Example
The prison has over a thousand inmates.
La prisión tiene más de mil internos.
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 /ɪnˈfjuːz/

infuse

infundir
Meaning
to fill or spread through something; to instill a quality, idea, or feeling
Example
The teacher tried to infuse her students with a love for reading.
La profesora trató de infundir a sus estudiantes con un amor por la lectura.
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.
C1 adjective /ɪnˈdiːsənt/

indecent

indecente
Meaning
not conforming to accepted standards of behavior or morality; improper or offensive
Example
He was warned for making an indecent remark during the meeting.
Fue advertido por hacer un comentario indecente.
C1 noun /ˈɪd.i.əm/

idiom

modismo
Meaning
A group of words whose meaning is different from the meanings of the individual words.
Example
The idiom 'break the ice' means to start a conversation in a friendly way.
El modismo 'romper el hielo' significa comenzar una conversación de manera amistosa.
C1 noun /ɪnˈdɪf.ər.əns/

Indifference

indiferencia; desinterés; apatía
Meaning
lack of interest, concern, or sympathy; the state of not caring about something
Example
His indifference to his studies resulted in poor grades throughout the semester.
Su indiferencia por sus estudios resultó en malas calificaciones durante todo el semestre.
C1 adjective ˌɪn.trəˈspek.tɪv

introspective

introspectivo
Meaning
Characterized by or given to introspection; examining one's own thoughts and feelings.
Example
Writers tend to be highly introspective individuals.
Los escritores tienden a ser individuos altamente introspectivos.
C1 noun /ɪnˈdɪɡ.nə.ti/

Indignity

indignidad; humillación; deshonra;
Meaning
treatment or circumstances that cause one to feel shame or loss of dignity; humiliation
Example
She refused to suffer the indignity of being searched without proper cause.
Ella se negó a sufrir la indignidad de ser registrada sin causa justificada.
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 noun /ɪmˈpjʊərəti/

impurity

impureza
Meaning
the state of being unclean or contaminated; a substance that makes something impure
Example
The scientist removed every impurity from the water sample.
El científico eliminó toda impureza de la muestra de agua.
C1 noun /ˌɪntɪˈmeɪʃən/

intimation

insinuación
Meaning
A subtle or indirect hint or suggestion.
Example
She gave no intimation of her plans.
Ella no dio ninguna insinuación sobre sus planes.
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 verb /ɪnˈvɪɡ.ər.eɪt/

invigorate

revitalizar
Meaning
To give strength or energy to someone or something.
Example
A morning walk can invigorate both body and mind.
Una caminata matutina puede revitalizar tanto el cuerpo como la mente.
C1 verb /ɪnˈtɒksɪkeɪt/

intoxicate

felicidad
Meaning
to make someone lose control of their faculties or behavior due to alcohol or drugs
Example
The strong drink quickly intoxicated him.
No pudo esconder su felicidad cuando recibió el premio.
C1 noun /ˌɪməˈtjʊərəti/

immaturity

inmadurez
Meaning
the state of not being fully developed emotionally, mentally, or physically; lack of maturity
Example
His immaturity made it difficult for him to handle responsibility.
Su inmadurez le dificultó manejar la responsabilidad.