insufficient
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B2 adjective /ˌɪnsəˈfɪʃənt/

insufficient

insuffisant
Meaning
Not enough; inadequate.
Example
His explanation was insufficient to clear the confusion.
Son explication était insuffisante pour clarifier la confusion.
B2 adjective /ˈɪmpæktfʊl/

impactful

impactant
Meaning
Having a major impact or effect; powerful and forceful.
Example
Her impactful speech moved the audience to take action.
Son discours impactant a poussé l'auditoire à passer à l'action.
C1 noun (plural) /ˈɪndɪˌsiːz/

indices

indices
Meaning
plural form of index; statistical measures or reference points used for comparison
Example
Stock market indices fell sharply after the announcement.
Les indices du marché boursier ont chuté fortement après l'annonce.
B1 noun /ˈɪnstəns/

instance

instance
Meaning
An example or single occurrence of something.
Example
This is just one instance of his generosity.
C'est juste un exemple de sa générosité.
C2 verb /ɪˈmjʊər/

immure

enfermer
Meaning
to confine or enclose someone against their will
Example
The prisoner was immured in a dark cell.
Le prisonnier a été enfermé dans une cellule sombre.
B2 noun /ɪmˈpeɪʃəns/

impatience

impatience
Meaning
The state of being quickly irritated or unable to wait calmly.
Example
His impatience grew as the meeting dragged on.
Son impatience grandissait à mesure que la réunion s'éternisait.
C1 noun /ˌɪnkjʊˈbeɪʃən/

incubation

le processus de maintenir des œufs, des cellules ou des organismes dans les conditions appropriées pour leur développement
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.
L'incubation des œufs a duré trois semaines.
B1 noun ɪˈnɪʃətɪv

initiative

initiative
Meaning
An act or strategy intended to resolve a difficulty or improve a situation; a fresh approach to something.
Example
NASA's initiative to return humans to the Moon is ambitious.
L'initiative de la NASA pour ramener des humains sur la Lune est ambitieuse.
C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

inexcusable
Meaning
Too bad to be justified or overlooked; unforgivable.
Example
His rude behavior was inexcusable.
Son comportement impoli était inexcusable.
C1 noun /ɪnˈsɜːrdʒənt/

insurgent

insurgé
Meaning
A person who rises in revolt against authority or government.
Example
The army arrested several insurgents after the attack.
L'armée a arrêté plusieurs insurgés après l'attaque.
C2 noun /ɪnˈhɪərəns/

inherence

inhérence
Meaning
The state of being an essential or permanent part of something.
Example
The inherence of risk is part of every business venture.
L'inhérence du risque fait partie de chaque aventure d'entreprise.
B2 noun ˈɪn.deks

index

index
Meaning
An alphabetical list of names, subjects, etc. with references to the places where they occur, typically found at the end of a book; a sign or measure of something.
Example
An index organizes critical data.
Un index organise les données importantes.
B1 adjective /ɪˈnɪʃəl/

initial

initial
Meaning
Existing or occurring at the beginning.
Example
Her initial reaction was one of surprise.
Sa réaction initiale fut une surprise.
C1 adjective /ɪˈmjuː.tə.bəl/

immutable

inaltérable
Meaning
Unchangeable, permanent, or fixed
Example
The laws of physics are considered immutable.
Les lois de la physique sont considérées inaltérables.
C1 verb /ɪnˈkrɪmɪˌneɪt/

incriminate

incriminer
Meaning
to make someone appear guilty of a crime or wrongdoing
Example
The new evidence could incriminate the suspect in the robbery case.
La nouvelle preuve pourrait incriminer le suspect dans l'affaire de vol.
C1 adjective /ɪmˈplɔːzəbl/

implausible

implausible
Meaning
Not seeming reasonable or probable; unlikely to be true.
Example
The story she told was so implausible that no one believed her.
L'histoire qu'elle a racontée était tellement implausible que personne ne l'a cru.
C1 noun /ˈɪnsɪdəns/

incidence

incidence
Meaning
the occurrence, rate, or frequency of something
Example
The incidence of road accidents has decreased this year.
L'incidence des accidents de la route a diminué cette année.
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 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.
C2 noun /ɪnˈkɒnstənsi/

inconstancy

inconstance
Meaning
The quality of changing frequently or being unreliable.
Example
The inconstancy of the weather makes planning difficult.
L'inconstance du temps rend la planification difficile.
B1 verb /ˌɪntəˈrʌpt/

interrupt

interrompre
Meaning
to stop someone from speaking or doing something by suddenly saying or doing something
Example
She tried not to interrupt while he was speaking.
Elle a essayé de ne pas interrompre pendant qu'il parlait.
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.
C2 adjective /ˌɪmpəˈmɪsəbl/

impermissible

interdit
Meaning
Not permitted or allowed.
Example
Such behavior is impermissible in the workplace.
Un tel comportement est interdit sur le lieu de travail.
C1 verb /ɪmˈpɑːrt/

impart

transmettre
Meaning
to make information known; to bestow or communicate
Example
The teacher imparted valuable knowledge to her students.
L'enseignant a imparté des connaissances précieuses à ses élèves.
B2 noun ˌɪm.plɪˈkeɪ.ʃən

implication

implication
Meaning
A conclusion that can be drawn from something although it is not explicitly stated; a likely consequence.
Example
The implication of climate change is severe.
L'implication du changement climatique est grave.
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.
Les changements dans son comportement étaient imperceptibles au début.
C2 adjective /ɪˈlɪbərəl/

illiberal

illibéral
Meaning
Opposed to liberal principles; restricting freedom of thought or behavior.
Example
The government was criticized for its illiberal policies.
Le gouvernement a été critiqué pour ses politiques illibérales.
B1 adjective /ɪmˈpres.ɪv/

Impressive

impressionnant
Meaning
striking; remarkable; having the ability to impress
Example
Her impressive performance earned her a standing ovation.
Sa performance impressionnante lui a valu une ovation debout.
B2 noun /ɪnˈspekʃən/

inspection

inspection
Meaning
a careful examination of something, especially to check that it is correct or safe
Example
The building passed the safety inspection last week.
Le bâtiment a passé l'inspection de sécurité la semaine dernière.
A2 adjective/noun /ˈaɪrɪʃ/

irish

bonheur
Meaning
relating to Ireland, its people, or its language
Example
The Irish countryside is very beautiful.
Elle ne pouvait pas cacher son bonheur lorsqu'elle a reçu le prix.
B2 verb /ˌɪntərˈviːn/

intervene

intervenir
Meaning
To come between people, groups, or events, often to prevent conflict or improve a situation.
Example
The teacher had to intervene to stop the fight between the students.
L'enseignant a dû intervenir pour arrêter la bagarre entre les élèves.
C2 adjective /ˈɪndələnt/

indolent

paresseux
Meaning
Wanting to avoid activity or exertion; lazy.
Example
The indolent cat slept in the sun all afternoon.
Le chat paresseux a dormi au soleil toute l'après-midi.
C1 adjective /ɪnˈveɪsɪv/

invasive

invasif
Meaning
Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.
Example
The doctor explained that the procedure was minimally invasive.
Le médecin a expliqué que la procédure était peu invasive.
C2 verb /ˈɪndjʊˌreɪt/

indurate

endurcir
Meaning
To harden or make something physically or emotionally tough.
Example
Years of hardship indurated his spirit.
Des années de difficultés ont induré son esprit.
C2 noun /ˈɪnfəmi/

infamy

bonheur
Meaning
the state of being well known for some bad quality or deed
Example
His name will live in infamy for the crimes he committed.
Elle n'a pas pu cacher son bonheur lorsqu'elle a reçu le prix.
C1 adjective /ɪˈnuːmərəbəl/

Innumerable

innombrable; incalculable; infini
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.
Il y a d'innombrables étoiles dans le ciel nocturne que nous ne pouvons pas voir à l'œil nu.
C2 adjective /ˌɪndaɪˈdʒestəbəl/

Indigestible

indigeste; difficile à digérer
Meaning
difficult or impossible to digest; hard to process in the stomach
Example
The old bread became hard and indigestible.
Le vieux pain est devenu dur et indigeste.
C1 adjective /ɪnˈɡreɪnd/

ingrained

enraciné
Meaning
Firmly fixed or established; deeply rooted and difficult to change.
Example
His ingrained habits were hard to break.
Ses habitudes enracinées étaient difficiles à briser.
C1 adjective /ˈɪnərmoʊst/

Innermost

le plus profond; le plus personnel
Meaning
most private and secret; deepest; most personal
Example
She shared her innermost feelings with her closest friend.
Elle a partagé ses sentiments les plus profonds avec son ami le plus proche.
C1 adjective /ˌɪndɪˈvɪzəbl/

indivisible

indivisible
Meaning
Not able to be divided or separated.
Example
The country's unity was indivisible despite differences.
L'unité du pays était indivisible malgré les différences.
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.
C2 adjective /ˌɪnkənˈsɪdərəbl/

inconsiderable

insignifiant
Meaning
Too small or unimportant to be worth considering.
Example
The donation was not inconsiderable, though smaller than expected.
La donation n'était pas insignifiante, bien qu'elle fût plus petite que prévu.
C1 adjective /ɪnˈfriːkwənt/

infrequent

peu fréquent
Meaning
Happening rarely or not often.
Example
He made infrequent visits to his hometown after moving abroad.
Il faisait des visites peu fréquentes dans sa ville natale après avoir déménagé à l'étranger.
A2 verb /ɪnˈvaɪt/

invite

inviter
Meaning
to ask someone to come to an event or to do something
Example
We should invite all our friends to the party.
Nous devrions inviter tous nos amis à la fête.
C2 verb /ˈɪntərˌdɪkt/

interdict

interdire
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.
Le tribunal a décidé d'interdire la vente des biens illégaux.
C2 adjective /ɪnˈkɒnstənt/

inconstant

inconstant
Meaning
frequently changing; not consistent or dependable
Example
His inconstant moods made it difficult to work with him.
Ses humeurs inconstantes rendaient difficile de travailler avec lui.
C1 adjective /ɪˈrɛpərəbəl/

Irreparable

irréparable
Meaning
impossible to repair or fix; permanent damage that cannot be undone
Example
The accident caused irreparable damage to his spine.
L'accident a causé des dommages irréparables à sa colonne vertébrale.
C2 noun /ɪnˈdɛntʃər/

indenture

contrat d'indenture
Meaning
A formal legal agreement, contract, or document, often relating to work or service.
Example
In the 18th century, many workers came under indenture to work overseas.
Au XVIIIe siècle, de nombreux travailleurs étaient sous contrat d'indenture pour travailler à l'étranger.
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.
A2 noun /ɪmˈpɔːtəns/

importance

importance
Meaning
The quality or state of being important; consequence or significance.
Example
The importance of time management cannot be overstated.
L'importance de la gestion du temps ne peut être surestimée.
C1 verb /ˈɪnstɪˌɡeɪt/

instigate

inciter
Meaning
To bring about or initiate an action, often something negative.
Example
He was accused of instigating the riot.
Il a été accusé d'inciter aux émeutes.
C1 adjective ˌɪn.trəˈspek.tɪv

introspective

introspectif
Meaning
Characterized by or given to introspection; examining one's own thoughts and feelings.
Example
Writers tend to be highly introspective individuals.
Les écrivains ont tendance à être des individus très introspectifs.
C2 adverb /ˈɪntʃmiːl/

inchmeal

petit à petit
Meaning
Gradually, little by little.
Example
The old castle fell inchmeal into ruin.
Le vieux château est tombé petit à petit en ruine.
C2 noun /ˌɪn.ɪˈbraɪ.ə.ti/

inebriety

ivresse
Meaning
the state of being drunk or intoxicated
Example
His frequent inebriety led to the loss of his job.
Son inconstance dans l'ivresse l'a conduit à perdre son travail.
C2 adjective /ˈɪnfəntaɪl/

infantile

infantile
Meaning
characteristic of an infant; childish
Example
His infantile behavior embarrassed everyone at the meeting.
Son comportement infantile a embarrassé tout le monde à la réunion.
C2 adjective /ˌɪrɪˈkɒnsɪləbl/

irreconcilable

irréconciliable
Meaning
impossible to make compatible or bring into harmony; unable to resolve differences
Example
The couple separated due to irreconcilable differences.
Le couple s'est séparé en raison de différences irréconciliables.
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.
C2 noun /ɪmp/

imp

petit diablotin espiègle
Meaning
a small mischievous devil or sprite; a playful troublemaker
Example
The child was acting like a little imp, hiding his toys everywhere.
L'enfant agissait comme un petit diablotin, cachant ses jouets partout.
C2 adjective /ɪnˈsɛndiˌɛri/

incendiary

incendiaire / provocateur
Meaning
designed to cause fires or stir up conflict
Example
The politician’s incendiary remarks angered the crowd.
Les remarques incendiaires du politicien ont mis en colère la foule.
C2 noun /ɪmˈpʌlʃən/

impulsion

impulsion
Meaning
a strong urge or drive to act; the act of impelling
Example
His impulsion to travel made him leave his job suddenly.
Son impulsion de voyager l'a poussé à quitter son travail soudainement.
C2 verb /ɪnˈveɪɡəl/

inveigle

manipuler
Meaning
To persuade someone to do something by deception or flattery.
Example
She inveigled him into signing the contract.
Elle l'a dupé pour qu'il signe le contrat.
B2 adjective ˌɪn.təˈræk.tɪv

interactive

interactif
Meaning
Allowing a two-way flow of information between it and a user, responding to the user's input.
Example
Interactive learning keeps students engaged in lessons.
L'apprentissage interactif maintient les étudiants engagés dans les leçons.
C2 noun /ɪmˌpɜːrtərbəˈbɪləti/

imperturbability

imperturbabilité
Meaning
The quality of being calm and not easily disturbed or upset.
Example
Her imperturbability during the crisis impressed everyone.
Son imperturbabilité pendant la crise a impressionné tout le monde.
B2 verb /ɪnˈtriːɡ/

intrigue

intriguer
Meaning
to arouse curiosity or interest; to make someone fascinated
Example
The mystery novel will intrigue any reader.
Le roman mystère intriguerait n'importe quel lecteur.
C1 noun /ˌɪn.dʒəˈnjuː.ɪ.ti/

ingenuity

ingéniosité
Meaning
The quality of being clever, original, and inventive.
Example
His ingenuity led to groundbreaking innovations.
Son ingéniosité a conduit à des innovations de rupture.
C2 verb ˈɪnʌndeɪt

inundate

inonder, submerger quelqu'un ou quelque chose avec des choses ou des personnes à traiter
Meaning
To flood; overwhelm someone or something with things or people to be dealt with
Example
The company was inundated with requests after the advertisement.
L'entreprise a été inondée de demandes après la publicité.
B2 adjective, noun /ˌɪn.təlˈɛk.tʃu.əl/

intellectual

intellectuel
Meaning
Relating to the intellect; a person who engages in critical thinking and study.
Example
She enjoys intellectual discussions about philosophy.
Elle aime les discussions intellectuelles sur la philosophie.
C1 noun /ˌɪm.pəˈzɪʃ.ən/

Imposition

imposition; charge; demande injuste
Meaning
the action or process of imposing something or of being imposed; an unfair burden or demand
Example
The imposition of new taxes without consultation angered the citizens greatly.
L'imposition de nouvelles taxes sans consultation a profondément enragé les citoyens.
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.
C2 adjective /ɪnˈɡlɔːriəs/

inglorious

honteux
Meaning
Causing shame or disgrace; not bringing honor or glory.
Example
The army suffered an inglorious defeat.
L'armée a subi une défaite honteuse.
B2 verb /ɪnˈkwaɪər/

inquire

demander
Meaning
to ask; to investigate
Example
She inquired about the job opening.
Elle a demandé des informations sur l'offre d'emploi.
C1 verb /ɪnˈklaɪn/

incline

s'incliner
Meaning
to feel willing or favorably disposed toward something; to bend or tilt
Example
She is inclined to agree with the proposal.
Elle est inclinée à être d'accord avec la proposition.
C2 noun /ˈɪsməs/ or /ˈɪsθməs/

isthmus

isthme
Meaning
A narrow strip of land connecting two larger land areas, often with water on either side.
Example
The Panama Canal cuts through the Isthmus of Panama.
Le canal de Panama traverse l'isthme de Panama.
B1 noun/adjective /ˈɪnstənt/

instant

instantané
Meaning
A very short period of time; happening immediately.
Example
He replied in an instant without hesitation.
Il a répondu en un instant sans hésitation.
B1 adverb /ɪnˈkrɛdɪbli/

incredibly

incroyablement
Meaning
to a great degree; extremely or unbelievably
Example
The view from the top of the mountain was incredibly beautiful.
La vue du sommet de la montagne était incroyablement belle.
A1 adjective /ɪmˈpɔː.tənt/

important

important
Meaning
Of great significance or value; likely to have a profound effect on success, survival, or well-being.
Example
Important steps must be taken to address pollution.
Des mesures importantes doivent être prises pour résoudre la pollution.
C2 adjective /ˌɪntərˈlɒkjətəri/

interlocutory

provisoire
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.
Le juge a émis une ordonnance provisoire pour maintenir le statu quo jusqu'à l'audience.
B2 noun /ˈɪn.flu.ən.sər/

Influencer

influenceur, personne qui recommande des produits
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.
Les influenceurs des réseaux sociaux façonnent les préférences des consommateurs.
C2 noun /ˌɪnəməˈrɑːtə/

inamorata

amante
Meaning
A woman with whom someone is in love; a female lover.
Example
He wrote a poem dedicated to his inamorata.
Il a écrit un poème dédié à son amante.
C2 verb /ɪnˈhjuːm/

inhume

inhumer
Meaning
to bury a dead body in the ground
Example
They inhumed the warrior with full honors.
Ils ont inhumé le guerrier avec tous les honneurs.
C2 noun /ɪnˈtɛnʃən/

intension

contenu interne
Meaning
The internal content of a concept; the set of attributes implied by a word or phrase.
Example
The intension of the word 'dog' includes being a mammal and domesticated.
L'intension du mot 'chien' inclut être un mammifère et être domestiqué.
B1 noun /ˈɪnsɪdənt/

incident

incident
Meaning
an event or occurrence, often unpleasant or unusual
Example
The police quickly responded to the incident in the park.
La police a rapidement répondu à l'incident dans le parc.
B2 adverb /ˌɪndəˈrɛktli/

indirectly

indirectement
Meaning
in a way that is not direct; through an intermediate means or influence
Example
The policy affected small businesses indirectly.
La politique a affecté indirectement les petites entreprises.
C2 verb /ɪnˈdaɪt/

indite

composer
Meaning
To write or compose (literary or formal works).
Example
The poet indited a heartfelt sonnet.
Le poète a composé un sonnet sincère.
C1 adjective /ˌɪnhɒˈspɪtəbl/

inhospitable

inhospitalier
Meaning
Harsh and difficult to live in; unfriendly or unwelcoming to guests.
Example
The desert is an inhospitable environment for most plants.
Le désert est un environnement inhospitalier pour la plupart des plantes.
A2 noun /ɪŋk/

Ink

encre
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.
Le vieux stylo a perdu de l'encre sur sa chemise blanche pendant la réunion.
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 /ɪmˈpiːtʃ/

impeach

destituer
Meaning
To charge a public official with misconduct while in office.
Example
The parliament voted to impeach the president.
Le parlement a voté pour destituer le président.
C1 adjective /ɪnˈæk.tɪv/

Inactive

inactif
Meaning
not active; not working; dormant; idle
Example
The volcano has been inactive for over a century.
Le volcan est inactif depuis plus d'un siecle.
B2 adverb /aɪˈrɒnɪkli/

ironically

ironiquement
Meaning
in a way that is contrary to what is expected or intended
Example
Ironically, the fire station burned down.
Ironicament, la caserne de pompiers a brûlé.
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.
B2 adjective ɪˈmɜː.sɪv

immersive

immersif
Meaning
Providing, involving, or characterized by deep absorption or immersion in something.
Example
Virtual reality creates an immersive learning environment.
La réalité virtuelle crée un environnement d'apprentissage immersif.
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.
B2 noun ɪnˈtɛɡrɪti

integrity

intégrité
Meaning
The quality of being honest and having strong moral principles; moral uprightness.
Example
Teachers' integrity fosters a positive learning environment.
L'intégrité des enseignants favorise un environnement d'apprentissage positif.
B2 adjective /ˌɪntərˈmiːdiət/

intermediate

intermédiaire
Meaning
Coming between two things in time, place, or order; in the middle level or stage.
Example
She is taking an intermediate-level French course.
Elle suit un cours de français de niveau intermédiaire.
C1 noun /ˌɪn.trəˈspek.ʃən/

introspection

introspection
Meaning
The examination or observation of one's own mental and emotional processes; self-reflection.
Example
Through introspection, she gained insight into her emotions.
Grâce à l'introspection, elle a acquis une profonde compréhension de ses émotions.
C2 verb /ɪmˈpjuːn/

impugn

contester la vérité, la validité ou l'honnêteté d'une déclaration ou d'un motif
Meaning
to dispute the truth, validity, or honesty of a statement or motive
Example
The lawyer tried to impugn the credibility of the witness.
L'avocat a essayé de contester la crédibilité du témoin.
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 /ɪnˈfɜːm/

infirm

fragile
Meaning
Weak, especially due to old age or illness.
Example
The infirm old man needed assistance to walk.
L'homme âgé et fragile avait besoin d'aide pour marcher.
B1 verb /ˌɪntərˈækt/

interact

interagir
Meaning
to communicate or work together with someone or something
Example
Students interact with teachers during class discussions.
Les étudiants interagissent avec les enseignants pendant les discussions en classe.
B2 adverb /ɪnˈɛvɪtəbli/

inevitably

inévitable
Meaning
in a way that cannot be avoided or prevented
Example
Inevitably, the team faced challenges during the project.
Inévitablement, l'équipe a rencontré des défis pendant le projet.
C2 noun /ˈaɪdɪl/

idyll

scène idyllique
Meaning
An extremely happy, peaceful, or picturesque episode or scene, often idealized.
Example
Their honeymoon was an idyll on a tropical island.
Leur lune de miel était une scène idyllique sur une île tropicale.
B1 noun /ɪnˈʃʊərəns/

insurance

assurance
Meaning
An arrangement by which a company provides compensation for loss, damage, or illness in return for a premium.
Example
He bought health insurance to cover medical expenses.
Il a acheté une assurance santé pour couvrir les frais médicaux.
C1 adjective /ɪˈlʌstriəs/

illustrious

illustre
Meaning
Well known, respected, and admired for past achievements.
Example
She had an illustrious career in medicine.
Elle avait une carrière illustre en médecine.
B2 adjective /ˈɪrɪteɪtɪd/

irritated

irrité
Meaning
feeling annoyed or impatient; having inflamed or sore physical condition
Example
She felt irritated by the constant noise outside her window.
Elle était irritée par le bruit constant à l’extérieur.
C1 verb /ɪnˈvælɪdeɪt/

invalidate

invalider
Meaning
To make something not valid or legally acceptable.
Example
The new evidence may invalidate the previous ruling.
La nouvelle preuve pourrait invalider la décision précédente.
C1 adjective /ˌɪnɑːrˈtɪkjʊlət/

inarticulate

inaudible
Meaning
Unable to express oneself clearly or effectively in speech or writing.
Example
She became inarticulate with emotion during the speech.
Elle est devenue inaudible avec émotion pendant le discours.
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.
C2 noun /ˈɪntərˌveɪl/

intervale

terre basse le long d'une rivière, généralement fertile et plate
Meaning
A low-lying tract of land along a river, usually fertile and flat.
Example
The farmers cultivated crops on the lush intervale by the river.
Les agriculteurs ont cultivé des cultures dans l'intervalle fertile près de la rivière.
C2 adjective /ɪmˈplaɪəbl/

impliable

impliquable
Meaning
Capable of being implied or suggested.
Example
The meaning of the statement is not directly clear but is impliable from the context.
Le sens de la déclaration n'est pas directement clair, mais il est impliquable à partir du contexte.
C2 noun /ˌɪnkænˈteɪʃən/

incantation

incantation
Meaning
a series of words used as a magic spell or charm
Example
The wizard chanted an incantation to summon the spirits.
Le magicien a récité une incantation pour invoquer les esprits.
A1 noun /ˈaɪs kriːm/

Ice-cream

glace
Meaning
a frozen sweet dessert made from dairy products, usually served cold
Example
Children love to eat ice-cream on hot summer days.
Les enfants adorent manger de la glace lors des chaudes journées d'été.
C2 verb ˈɪn.kʌl.keɪt

inculcate

inculquer
Meaning
Instill an attitude, idea, or habit by persistent instruction; to teach and impress by frequent repetitions.
Example
Parents should inculcate good values in their children.
Les parents devraient inculquer de bonnes valeurs à leurs enfants.
A2 adjective /ɪl/

Ill

malade; en mauvaise santé
Meaning
sick; unwell; in poor health
Example
He felt ill and decided to stay home from work.
Il se sentait malade et a décidé de rester à la maison du travail.
C2 adverb /ɪnˈdjuːbɪtəbli/

indubitably

indubitablement
Meaning
Without a doubt; certainly.
Example
She is indubitably the best candidate for the job.
Elle est indubitablement la meilleure candidate pour le poste.
C2 verb /ɪnˈɡreɪʃiˌeɪt/

ingratiate

se faire bien voir
Meaning
To gain favor or approval by deliberate effort, often in a flattering way.
Example
She tried to ingratiate herself with her boss by complimenting him often.
Elle a essayé de s'ingratiser auprès de son patron en le complimentant souvent.
C1 adjective ˈɪn.tər.ɪm

interim

intérimaire
Meaning
In or for the intervening period; provisional or temporary.
Example
Interim governments manage transitional phases.
Les gouvernements intérimaires gèrent les phases de transition.
B2 noun, verb /ɪntʃ/

inch

pouce / se déplacer lentement
Meaning
A unit of length equal to 2.54 centimeters; or to move slowly and carefully in small amounts.
Example
She inched closer to the edge of the stage.
Elle s'est lentement rapprochée du bord de la scène.
C1 adjective /ɪnˈveə.ri.ə.bəl/

Invariable

invariable; constant; toujours le même
Meaning
never changing; constant; always the same
Example
His invariable routine includes morning exercise and coffee.
Sa routine invariable comprend des exercices matinaux et du café.
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 /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.