Innate
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C1 adjective ɪˈneɪt

Innate

inné ou naturel
Meaning
Existing from birth or natural
Example
She has an innate talent for music.
Elle a un talent inné pour la musique.
C1 adjective ɪn ˈfleɪ.ʃə.ner.i

inflationary

inflationniste
Meaning
Characterized by or tending to cause monetary inflation; relating to rising prices.
Example
The government took measures to control inflationary pressures.
Le gouvernement a pris des mesures pour contrôler les pressions inflationnistes.
C1 adjective /ɪˈnɜːrt/

inert

inactif
Meaning
lacking the ability or strength to move or act; chemically inactive
Example
The patient remained inert on the bed.
Le patient est resté inactif sur le lit.
C1 adjective /ˌɪn.səbˈstæn.ʃəl/

insubstantial

insubstantiel
Meaning
Lacking strength, substance, or solidity.
Example
The evidence provided was insubstantial and unconvincing.
Les preuves fournies étaient insubstantielles et non convaincantes.
C1 verb /ˌɪn.trəˈspekt/

introspect

introspecter
Meaning
To examine one's own thoughts, feelings, or mental state.
Example
He often introspects before making important decisions.
Il se livre souvent à de l'introspection avant de prendre des décisions importantes.
C1 adverb /ɪnˈvɜːrs.li/

Inversely

inversement; de manière opposée
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.
Le prix des biens est inversement lié à leur disponibilité sur le marché.
C1 noun /ɪmˈpɜːrtɪnəns/

impertinence

impertinence
Meaning
lack of respect; rudeness
Example
The teacher was shocked by the student's impertinence.
Le professeur a été choqué par l'impertinence de l'étudiant.
C1 adjective /ˌɪndɪˈskraɪbəbəl/

Indescribable

indescriptible
Meaning
impossible to describe or express in words; beyond description
Example
The beauty of the sunset was indescribable.
La beauté du coucher de soleil était indescriptible.
C1 adjective /ɪmˈpɜːmiəbl/

impermeable

imperméable
Meaning
Not allowing fluid or gas to pass through.
Example
The container is made of impermeable plastic.
Le conteneur est fabriqué en plastique imperméable.
C1 noun /ɪnˈtɛstɪn/

intestine

intestin
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.
Le médecin a expliqué comment les nutriments sont absorbés dans l'intestin grêle.
C1 adjective ɪnˈdʒiː.ni.əs

ingenious

ingénieux
Meaning
Showing inventiveness and skill; clever, original, and inventive.
Example
His ingenious ideas transformed modern physics.
Ses idées ingénieuses ont transformé la physique moderne.
C1 noun /ˌɪntərˈmɪʃən/

intermission

entracte
Meaning
A pause or break, especially during a performance or event.
Example
The play had a twenty-minute intermission.
La pièce a eu un entracte de vingt minutes.
C1 adjective /aɪˈreɪt/

irate

furieux
Meaning
Extremely angry.
Example
The customer became irate after waiting for hours.
Le client est devenu furieux après avoir attendu pendant des heures.
C1 adjective /ˌɪnədˈvɜːrtənt/

inadvertent

involontaire, non intentionnel
Meaning
Not resulting from or achieved through deliberate planning; unintentional.
Example
Her inadvertent mistake caused a delay in the project.
Son erreur involontaire a causé un retard dans le projet.
C1 adjective /ˈɜːrksəm/

irksome

énervant
Meaning
annoying or irritating
Example
Waiting in a long line is one of the most irksome tasks.
Attendre dans une longue file est l'une des tâches les plus énervantes.
C1 adjective /ɪnˈdetɪd/

Indebted

endetté; reconnaissant
Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
Je suis profondément endetté envers ma professeure pour toute sa guidance.
C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

irrégularité
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.
L’audit a révélé plusieurs irrégularités financières dans les registres de l’entreprise.
C1 adverb /ˈɪnwərdli/

inwardly

intérieurement
Meaning
In the mind or spirit; not outwardly visible.
Example
She smiled outwardly but inwardly she was worried.
Elle a souri extérieurement, mais intérieurement elle était inquiète.
C1 noun /ɪnˈdɪɡ.nə.ti/

Indignity

indignité; humiliation; déshonneur;
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.
Elle a refusé de subir l'indignité d'être fouillée sans raison valable.
C1 noun /ɪmˈpɒs.tər/

Impostor

imposteur; fraudeur
Meaning
a person who pretends to be someone else in order to deceive others; a fraud
Example
The impostor convinced everyone he was a doctor until his fake credentials were discovered.
L'imposteur a convaincu tout le monde qu'il était un médecin jusqu'à ce que ses faux diplômes soient découverts.
C1 adjective /ˌɪrɪˈprɛsəbl̩/

irrepressible

irrépressible
Meaning
Impossible to control or restrain.
Example
She had an irrepressible urge to laugh during the speech.
Elle ne pouvait cacher son irrépressible envie de rire pendant le discours.
C1 noun /ɪnˈfjuːʒən/

infusion

infusion
Meaning
the act of introducing something into another; a drink made by steeping leaves or herbs in liquid
Example
She prepared a calming infusion of chamomile tea.
Elle a préparé une infusion apaisante de thé à la camomille.
C1 adjective ɪˈluː.sər.i

illusory

illusoire
Meaning
Based on illusion; not real although seeming to be.
Example
His sense of security was entirely illusory.
Son sentiment de sécurité était entièrement illusoire.
C1 noun /ɪnˈsɒm.ni.ə/

Insomnia

insomnie
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.
Son insomnie chronique lui rendait difficile de se concentrer pendant les heures de travail.
C1 noun /ɪnˈɛk.wɪ.ti/

inequity

inégalité
Meaning
Lack of fairness or justice; unequal distribution or treatment.
Example
Social inequity continues to be a global issue.
L'inégalité sociale reste un problème mondial.
C1 adjective /ɪˈnænɪmət/

inanimate

objet inanimé
Meaning
not alive, especially not in the manner of animals and humans; lifeless
Example
The museum was full of inanimate objects from ancient times.
Le musée était rempli d'objets inanimés datant de l'époque ancienne.
C1 noun /ˌɪn.trəˈvɜːr.ʒən/

introversion

introversion
Meaning
The tendency to be inward-looking and shy, preferring solitary activities.
Example
Her introversion made it difficult for her to enjoy large parties.
Son introversion rendait difficile pour elle de profiter des grandes fêtes.
C1 adjective /ɪmˈpɜːrviəs/

impervious

imperméable
Meaning
Not allowing fluid to pass through; unable to be affected by something.
Example
The jacket is impervious to rain.
La veste est imperméable à la pluie.
C1 noun /ˌɪn.səˌbɔːr.dɪˈneɪ.ʃən/

insubordination

insubordination
Meaning
Defiance of authority; refusal to obey orders.
Example
The soldier was punished for insubordination during the mission.
Le soldat a été puni pour insubordination pendant la mission.
C1 noun /ɪnˈkɒmpɪtəns/

incompetence

incompétence
Meaning
Lack of ability, skill, or effectiveness in doing something.
Example
The project failed due to the manager’s incompetence.
Le projet a échoué à cause de l'incompétence du manager.
C1 noun ˌɪnsjʊˈleɪʃən

insulation

isolation
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.
L'isolation des zones de stockage des aliments peut empêcher les nuisibles d'entrer.
C1 adjective /ˌɪnsərˈmaʊntəbl/

insurmountable

insurmontable
Meaning
Too great to be overcome.
Example
The explorers faced insurmountable odds in the desert.
Les explorateurs ont fait face à des obstacles insurmontables dans le désert.
C1 adjective /ˌɪn.ɪˈfɛk.tʃu.əl/

ineffectual

inefficace
Meaning
Not producing any or the desired effect; lacking the ability or qualities to achieve a purpose.
Example
The manager’s ineffectual leadership caused the team to lose motivation.
Le leadership inefficace du manager a causé la perte de motivation de l'équipe.
C1 adjective /ˈaɪərnˌklæd/

ironclad

inflexible
Meaning
impossible to change, break, or dispute; very strong and firm
Example
The company had an ironclad contract with its suppliers.
L'entreprise avait un contrat inflexible avec ses fournisseurs.
C1 noun /ˈɪnflʌks/

influx

afflux
Meaning
A large arrival or flow of people or things.
Example
The city experienced an influx of tourists during the festival.
La ville a connu un afflux de touristes pendant le festival.
C1 adjective /ɪˈnɛpt/

inept

inepte
Meaning
lacking skill or ability; clumsy or incompetent
Example
His inept handling of the situation made it worse.
Sa gestion inepte de la situation a empiré les choses.
C1 noun /ɪnˈfɜː.mə.ti/

Infirmity

faiblesse; maladie; fragilité
Meaning
physical or mental weakness; a disease or ailment; frailty
Example
Despite his advanced age and various infirmities, he remained mentally sharp and alert.
Malgré son âge avancé et ses diverses infirmités, il est resté mentalement vif et alerte.
C1 adjective /ɪnˈsɪstənt/

insistent

insistant
Meaning
demanding something firmly and refusing to accept no
Example
The child was insistent on getting a new toy.
L'enfant était insistant pour obtenir un nouveau jouet.
C1 adjective /ˌɪlɪˈdʒɪtɪmət/

illegitimate

illégitime
Meaning
Not authorized by law, rules, or standards; not recognized as valid.
Example
The court ruled the contract to be illegitimate.
Le tribunal a jugé que le contrat était illégitime.
C1 verb /ˈɪtəreɪt/

iterate

itérer
Meaning
To repeat a process or statement, often to improve or refine.
Example
The software team will iterate the design until it meets user needs.
L'équipe de développement itérera la conception jusqu'à ce qu'elle réponde aux besoins des utilisateurs.
C1 noun /ˈɪnstɪˌɡeɪtər/

instigator

instigateur
Meaning
A person who brings about or initiates something, usually something bad.
Example
The police identified him as the instigator of the violence.
La police l'a identifié comme l'instigateur de la violence.
C1 adjective /ˌɪnkənˈsɪdərət/

inconsiderate

inconsidéré
Meaning
Thoughtless; showing a lack of concern for others.
Example
It was inconsiderate of him to play loud music late at night.
C'était inconsidéré de sa part de jouer de la musique forte tard dans la nuit.
C1 noun /ˌɪrɪˌspɒnsəˈbɪləti/

irresponsibility

irresponsabilité
Meaning
lack of responsibility or accountability; failure to act in a reliable or sensible way
Example
The accident was caused by his irresponsibility at work.
L'accident a été causé par son irresponsabilité au travail.
C1 adjective /ˈɪndɪɡoʊ bluː/

Indigo-blue

bleu indigo
Meaning
a deep blue color with a purplish tinge
Example
The indigo-blue sky looked magnificent at twilight.
Le ciel bleu indigo semblait magnifique au crépuscule.
C1 adjective /ɪˈluː.sɪv/

Illusive

illusoire; semblant d'exister mais irréel; trompeur
Meaning
deceptive; appearing to exist but not real; misleading
Example
The promise of easy money proved to be illusive and misleading.
La promesse d'argent facile s'est avérée illusoire et trompeuse.
C1 noun /ˈɪŋklɪŋ/

inkling

indice
Meaning
A slight idea, hint, or suspicion about something.
Example
She had an inkling that he was planning a surprise.
Elle avait une vague idée qu'il préparait une surprise.
C1 adjective /ˌɪnəˈtɛntɪv/

inattentive

inattentif
Meaning
not paying attention; lacking focus or concentration
Example
The inattentive student missed several important instructions.
L'étudiant inattentif a manqué plusieurs consignes importantes.
C1 verb /ɪnˈsaɪt/

incite

inciter
Meaning
to provoke; to stir up
Example
His speech incited the crowd to violence.
Son discours a incité la foule à la violence.
C1 verb /ɪnˈkɑːrsəreɪt/

incarcerate

incarcérer
Meaning
to imprison or confine someone
Example
The authorities incarcerated the criminal after the trial.
Les autorités ont emprisonné le criminel après le procès.
C1 adjective /ˈɪnbɔːrn/

Inborn

inné; congénital; inhérent
Meaning
existing from birth; natural; inherent
Example
She has an inborn talent for music.
Elle a un talent inné pour la musique.
C1 noun ˌɪn.toʊˈneɪ.ʃən

intonation

intonation
Meaning
The rise and fall of tone in speech and pronunciation.
Example
Proper intonation enhances the clarity of a speech.
Une intonation appropriée améliore la clarté d'un discours.
C1 noun /ɪnˈdem.nə.ti/

Indemnity

indemnité
Meaning
security or protection against a loss or other financial burden; compensation for damage or loss
Example
The insurance company provided full indemnity for the damages caused by the flood.
La compagnie d'assurance a fourni une indemnité complète pour les dommages causés par l'inondation.
C1 noun /ˌɪnklɪˈneɪʃən/

inclination

inclination
Meaning
A natural tendency or urge to act or feel in a particular way.
Example
She has an inclination towards helping others.
Elle a une inclination à aider les autres.
C1 adjective /ɪnˈses.ənt/

incessant

incessant
Meaning
Continuing without pause or interruption; constant.
Example
The incessant noise from the construction site made it hard to concentrate.
Le bruit incessant du chantier rendait la concentration difficile.
C1 adjective /ˌɪndɪˈspjuːtəbəl/

Indisputable

indiscutable; incontestable; certain
Meaning
impossible to deny or argue against; undeniable; certain
Example
The evidence against him was indisputable.
Les preuves contre lui étaient indiscutables.
C1 adjective /ˌɪnkəmˈpætəbl/

incompatible

incompatible
Meaning
Not able to exist or work together without conflict.
Example
Their personalities were completely incompatible.
Leurs personnalités étaient complètement incompatibles.
C1 adjective /ɪˈlɪsɪt/

illicit

illicite
Meaning
Forbidden by law, rules, or custom.
Example
The police shut down the illicit drug operation.
La police a fermé l'opération de drogue illicite.
C1 noun /ɪmˈprɪzənmənt/

imprisonment

emprisonnement
Meaning
the act of putting someone in prison; the state of being confined as punishment
Example
He faced imprisonment for violating the court order.
Il a fait face à l'emprisonnement pour avoir violé l'ordre du tribunal.
C1 noun /ˌɪnɪkˈspɪəriəns/

inexperience

inexpérience
Meaning
Lack of knowledge or skill in a particular activity or field.
Example
His inexperience in handling negotiations was evident.
Son inexpérience dans la gestion des négociations était évidente.
C1 verb /ɪnˈdʌkt/

induct

admettre formellement quelqu'un dans une position, organisation ou bureau
Meaning
to formally admit someone into a position, organization, or office
Example
She was inducted into the university's honor society.
Elle a été admise dans la société d'honneur de l'université.
C1 verb /ɪnˈstɪl/

instill

instiller
Meaning
to gradually but firmly establish an idea, attitude, or habit in someone's mind
Example
Parents try to instill good values in their children.
Les parents essaient d'inculquer de bonnes valeurs à leurs enfants.
C1 noun /ɪnˈækjʊrəsi/

inaccuracy

inexactitude
Meaning
lack of accuracy or precision; an incorrect or wrong detail
Example
The report contained several factual inaccuracies.
Le rapport contenait plusieurs inexactitudes.
C1 adverb, adjective /ˌɪnkɑːɡˈniːtoʊ/

incognito

incognito
Meaning
In disguise or with one's identity concealed.
Example
The celebrity traveled incognito to avoid the paparazzi.
La célébrité a voyagé incognito pour éviter les paparazzis.
C1 verb /ˈɪnkjʊˌbeɪt/

incubate

incuber
Meaning
to keep eggs, cells, or organisms at the right conditions for development
Example
The hen will incubate the eggs until they hatch.
La poule incubera les œufs jusqu'à ce qu'ils éclosent.
C1 noun ˌɪndɪˈspensəbl səˈpɔːrt

indispensable support

soutien indispensable
Meaning
Essential assistance that cannot be done without; absolutely necessary help.
Example
Volunteers provide indispensable support to communities.
Les bénévoles apportent un soutien indispensable aux communautés.
C1 adjective /ɪnˈkwɪzɪtɪv/

inquisitive

inquisitif
Meaning
Curious or eager to learn and ask questions.
Example
The inquisitive child asked endless questions about the stars.
L'enfant inquisitif a posé d'innombrables questions sur les étoiles.
C1 adjective /ˌɪn.dɪˈspen.sə.bəl/

indispensable

indispensable
Meaning
Absolutely necessary, essential
Example
Water is indispensable for human survival.
L'eau est indispensable à la survie humaine.
C1 verb /aɪˈdiː.ə.laɪz/

idealize

idéaliser
Meaning
To regard or represent something as perfect or better than it really is.
Example
Children often idealize their parents.
Les enfants idéalisent souvent leurs parents.
C1 adjective /ˌaɪdiəˈlɪstɪk/

Idealistic

idéaliste
Meaning
pursuing high principles or ideals; unrealistically optimistic
Example
She has an idealistic view of changing the world.
Elle a une vision idéaliste de changer le monde.
C1 adjective /ɪnˈdɪɡnənt/

indignant

indigné
Meaning
Feeling or showing anger at something considered unfair or unjust.
Example
She was indignant when accused of cheating.
Elle était indignée lorsqu'elle a été accusée de tricher.
C1 noun /ˌɪnkoʊˈhɪrəns/

incoherence

incohérence
Meaning
The quality of being unclear, confused, or lacking logical connection.
Example
His speech was full of incoherence and difficult to follow.
Son discours était plein d'incohérences et difficile à suivre.
C1 adjective /ˌɪndɪˈskrɪmɪnət/

indiscriminate

indiscriminé
Meaning
Done without careful judgment; random or haphazard.
Example
The indiscriminate use of pesticides harms the environment.
L'utilisation indiscriminée de pesticides nuit à l'environnement.
C1 noun ɪˌræʃ.ənˈæl.ɪ.ti

irrationality

irrationalité, absence de logique, déraison
Meaning
The quality of being illogical or unreasonable; lack of rational thought.
Example
His decision was driven by complete irrationality.
Sa décision a été guidée par une irrationalité totale.
C1 noun /ɪnˈdjuːsmənt/

inducement

incitation
Meaning
something that persuades or encourages someone to do something
Example
The company offered a bonus as an inducement to employees.
L'entreprise a offert une prime comme incitation aux employés.
C1 adjective /ɪnˈsɪdiəs/

insidious

insidieux
Meaning
Proceeding in a gradual, subtle way but with harmful effects.
Example
The insidious spread of misinformation can damage trust.
La propagation insidieuse de la désinformation peut nuire à la confiance.
C1 noun /ɪˌluːmɪˈneɪʃən/

illumination

éclairage
Meaning
the act of lighting something or making something clear
Example
The street was filled with bright illumination from the lamps.
La rue était éclairée par l'éclairage brillant des lampes.
C1 verb /ɪnˈfrɪndʒ/

infringe

enfreindre
Meaning
To actively break the terms of a law, agreement, or right.
Example
Copying this software without permission will infringe copyright laws.
Copier ce logiciel sans permission enfreindra les lois sur le droit d'auteur.
C1 noun /ˌɪmɔːrˈtæləti/

immortality

immortalité
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.
De nombreuses cultures anciennes pensaient que les héros pouvaient atteindre l’immortalité par de grands exploits.
C1 noun /ˌɪnkəmˌpætəˈbɪlɪti/

incompatibility

incompatibilité
Meaning
the state of being unable to exist or work together harmoniously; lack of compatibility
Example
The project failed because of incompatibility between the two software systems.
Le projet a échoué à cause de l’incompatibilité entre les deux systèmes logiciels.
C1 verb /ˌɪntərˈsɛpt/

intercept

Meaning
to stop, catch, or seize something on its way from one place to another
Example
The police intercepted the stolen car before it crossed the border.
C1 adjective /ɪnˈdʌktɪv/

inductive

inductif
Meaning
characterized by the inference of general laws from particular instances; reasoning from specific cases to general principles
Example
The scientist used inductive reasoning to form a hypothesis.
Le scientifique a utilisé le raisonnement inductif pour formuler une hypothèse.
C1 adjective /ɪnˈdefɪnət/

Indefinite

indéfini
Meaning
not clearly defined; uncertain; vague; unlimited in time
Example
The meeting has been postponed for an indefinite period.
La réunion a été reportée pour une période indéfinie.
C1 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

dommages irréversibles
Meaning
Harm or injury that cannot be undone or repaired.
Example
Climate change causes irreversible damage to ecosystems.
Le changement climatique cause des dommages irréversibles aux écosystèmes.
C1 verb /ɪmˈplɔːr/

implore

implorer
Meaning
To beg someone earnestly or desperately to do something.
Example
She implored him to stay with her.
Elle lui implora de rester avec elle.
C1 noun /ˌɪməˈtjʊərəti/

immaturity

immaturité
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.
Son immaturité a rendu la gestion des responsabilités difficile.
C1 noun /ˌɪnflɛksɪˈbɪlɪti/

inflexibility

inflexibilité
Meaning
the quality of being rigid or unwilling to change; lack of adaptability
Example
The inflexibility of the rules caused unnecessary delays.
L’inflexibilité des règles a causé des retards inutiles.
C1 adjective /ˌɪndɪˈstɪŋkt/

indistinct

indistinct
Meaning
Not clear or sharply defined; vague or blurred.
Example
The sound of voices was indistinct in the distance.
Le son des voix était indistinct au loin.
C1 noun /ˈɪn.floʊ/

inflow

afflux
Meaning
The movement of things such as money, people, or water into a place.
Example
The inflow of tourists boosted the local economy.
L'afflux de touristes a stimulé l'économie locale.
C1 adjective /ɪnˈsɛnsəbl/

insensible

insensible
Meaning
Unconscious; unaware of or indifferent to something.
Example
He was insensible to the cold as he lay in the snow.
Il était insensible au froid lorsqu'il était allongé dans la neige.
C1 noun ˌɪnfɛsˈteɪʃən

infestation

infestation, présence anormalement élevée d'insectes ou d'animaux dans un endroit
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.
L'infestation de fourmis dans la cuisine a conduit à des mesures immédiates de contrôle des nuisibles.
C1 noun /ˌɪnfɪˈdɛləti/

infidelity

infidélité
Meaning
the act of being unfaithful to a spouse or partner
Example
Their marriage ended due to his infidelity.
Leur mariage a pris fin à cause de son infidélité.
C1 noun /ɪnˌkɑːsəˈreɪʃən/

incarceration

incarcération
Meaning
the state of being imprisoned or confined
Example
The criminal faced years of incarceration for his crimes.
Le criminel a purgé des années d'incarcération pour ses crimes.
C1 noun /ɪmˈbæl.əns/

Imbalance

déséquilibre
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.
Le docteur a dit que les vertiges du patient étaient causés par un déséquilibre dans l'oreille interne.
C1 adjective /ɪnˈsɒlvənt/

insolvent

insolvable
Meaning
unable to pay debts owed
Example
The insolvent firm could not meet its financial obligations.
L'entreprise insolvable n'a pas pu remplir ses obligations financières.
C1 noun /ɪnˈdʌstriəsnəs/

industriousness

diligence
Meaning
The quality of being hardworking and diligent.
Example
His industriousness earned him a promotion at work.
Sa diligence lui a valu une promotion au travail.
C1 noun /ˈɪnkwest/

inquest

enquête
Meaning
A legal or official inquiry, especially into the cause of a death.
Example
The inquest revealed the cause of the accident.
L'enquête a révélé la cause de l'accident.
C1 verb /ˈɪmplɪˌkeɪt/

implicate

impliquer
Meaning
To show someone’s involvement in a crime or wrongdoing.
Example
The evidence implicated several officials in the scandal.
Les preuves ont impliqué plusieurs responsables dans le scandale.
C1 noun /ˌɪntərˌɒpərəˈbɪləti/

interoperability

interopérabilité
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.
L'interopérabilité des différents systèmes logiciels garantit un flux de travail fluide.
C1 verb /ɪˈluːmɪneɪt/

illuminate

illuminer
Meaning
To light up or make something clearer.
Example
Streetlights illuminate the road at night.
Les réverbères illuminent la route la nuit.
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 vue depuis la montagne était incomparable.
C1 verb /ɪnˈskraɪb/

inscribe

graver
Meaning
to write or carve words or symbols on a surface
Example
They inscribed her name on the trophy.
Ils ont gravé son nom sur le trophée.
C1 adjective /ˌɪrɪˈspɛktɪv/

Irrespective

indifférent; sans tenir compte
Meaning
without taking something into account; regardless of
Example
All students will be treated equally, irrespective of their background.
Tous les étudiants seront traités de manière égale, indépendamment de leurs antécédents.
C1 adjective /ɪnˈdʒʊəriəs/

injurious

nuisible
Meaning
Causing or likely to cause harm or damage.
Example
Smoking is injurious to health.
Fumer est nuisible à la santé.
C1 adjective /ˈɪnsələnt/

insolent

insolent, arrogant
Meaning
showing a rude and arrogant lack of respect
Example
The insolent student refused to follow the teacher's instructions.
L'étudiant insolent a refusé de suivre les instructions du professeur.
C1 noun /ˌɪntərˈmiːdiˌɛri/

intermediary

intermédiaire
Meaning
A person who acts as a link between people in order to try to bring about an agreement; a mediator.
Example
The diplomat served as an intermediary between the two conflicting nations.
Le diplomate a agi comme intermédiaire entre les deux nations en conflit.
C1 verb /ɪɡˈnaɪt/

ignite

enflammer
Meaning
To catch fire or cause to catch fire; to start or arouse.
Example
The sparks ignited the dry leaves in seconds.
Les étincelles ont enflammé les feuilles sèches en quelques secondes.
C1 adjective /ˌaɪ.di.əˈlɒdʒ.ɪ.kəl/

ideological

idéologique
Meaning
Relating to or based on a system of ideas or beliefs.
Example
The two parties are divided by deep ideological differences.
Les deux partis sont divisés par de profondes divergences idéologiques.
C1 verb /ɪnˈfɛst/

infest

infester
Meaning
to overrun in large numbers, especially so as to cause damage or discomfort
Example
The old house was infested with rats.
La vieille maison était infestée de rats.
C1 adjective ˌɪn.təˈmɪt.ənt

intermittent

intermittent
Meaning
Happening irregularly, not continuously.
Example
The rain was intermittent throughout the day.
La pluie était intermittente toute la journée.
C1 noun /ˈɪn.tə.lekt/

intellect

intellect
Meaning
The ability to think, reason, and understand objectively.
Example
Her intellect is admired by all her colleagues.
Son intellect est admiré par tous ses collègues.
C1 adjective /ɪmˈpoʊzɪŋ/

imposing

imposant
Meaning
having an appearance that is grand, impressive, or commanding
Example
The castle is an imposing structure overlooking the valley.
Le château est une structure imposante qui surplombe la vallée.
C1 noun /ˌɪnsəˈfɪʃənsi/

insufficiency

insuffisance
Meaning
The state of not being enough or not being adequate.
Example
The project failed due to the insufficiency of funds.
Le projet a échoué en raison de l'insuffisance des fonds.
C1 adjective /ɪˈræʃənəl/

irrational

irrationnel
Meaning
not logical or reasonable; lacking clear thought
Example
His fear of the dark was completely irrational.
Sa peur de l'obscurité était complètement irrationnelle.
C1 noun ɪnˌten.sɪ.fɪˈkeɪ.ʃən

intensification

intensification
Meaning
The process of becoming or making something more intense or extreme.
Example
The intensification of climate change requires urgent action.
L'intensification du changement climatique nécessite une action urgente.
C1 noun /ɪˈrɛlɪvənsi/

irrelevancy

irrélevance
Meaning
the state of being unrelated or unimportant to the matter at hand
Example
The judge dismissed the argument because of its irrelevancy to the case.
Le juge a rejeté l’argument en raison de son irrélevance pour l’affaire.
C1 adjective /ˌɪnkənˈsiːvəbl̩/

inconceivable

inconcevable
Meaning
Impossible to imagine or believe; beyond comprehension.
Example
It seemed inconceivable that she could finish the marathon after such little training.
Il semblait inconcevable qu'elle puisse finir le marathon après si peu d'entraînement.
C1 adjective /ɪmˈpæsəbəl/

impassable

impraticable
Meaning
Impossible to travel along or over.
Example
The road became impassable after the heavy snowfall.
La route est devenue impraticable après la forte neige.
C1 noun /ˈɪnˌmeɪt/

inmate

détenu
Meaning
a person confined to an institution such as a prison or hospital
Example
The prison has over a thousand inmates.
La prison a plus de mille détenus.
C1 adjective /ɪnˈvɛntɪv/

inventive

inventif
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.
L'inventeur était connu pour ses solutions inventives aux problèmes quotidiens.
C1 adjective /ɪnˈtændʒəbl/

intangible

intangible
Meaning
Unable to be touched or grasped; not having a physical presence.
Example
Trust is an intangible quality in relationships.
La confiance est une qualité intangible dans les relations.
C1 adjective ˌɪdiəsɪnˈkrætɪk

idiosyncratic

particulier et individuel
Meaning
Relating to idiosyncrasy; peculiar or individual.
Example
His idiosyncratic behavior set him apart from his colleagues.
Son comportement idiosyncratique le distinguait de ses collègues.