underwrite
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C2 verb /ˈʌndərˌraɪt/

underwrite

garantir un soutien financier
Meaning
To guarantee financial support, especially by agreeing to cover losses or risks; in insurance, to assess and accept risks.
Example
The bank agreed to underwrite the company's new bond issue.
La banque a accepté de souscrire à la nouvelle émission d'obligations de l'entreprise.
C1 adjective ʌnˈtʃɑːtɪd

uncharted

inexploré
Meaning
Not mapped or surveyed; unknown or unexplored.
Example
The mission aimed to explore uncharted areas of the planet.
La mission visait à explorer des zones inexplorées de la planète.
B2 verb /ʌnˈkʌvə(r)/

uncover

découvrir
Meaning
to reveal something that was hidden or secret
Example
The investigation uncovered new evidence.
L'enquête a découvert de nouvelles preuves.
C1 noun /ˈʌndərˌteɪkər/

undertaker

employé des pompes funèbres
Meaning
A person whose job is to prepare the dead for burial and arrange funerals.
Example
The undertaker prepared the body for the funeral service.
L'employé des pompes funèbres a préparé le corps pour le service funéraire.
C1 adjective /ˌʌn.əˈdʌl.tə.reɪ.tɪd/

Unadulterated

pur
Meaning
not mixed or diluted with any different or extra elements; pure
Example
She felt unadulterated joy when she heard the news.
Elle a ressenti une joie pure lorsqu'elle a entendu la nouvelle.
C1 noun /ˈʌndərˌwɜːrld/

underworld

sous-monde
Meaning
The criminal world of organized crime or the mythical world of the dead.
Example
The detective spent years studying the secrets of the underworld.
Le détective a passé des années à étudier les secrets du sous-monde.
B1 verb /ʌnˈpæk/

unpack

déballer
Meaning
to remove items from a container; to explain or analyze something in detail
Example
After arriving home, she began to unpack her suitcase.
Après être rentrée à la maison, elle a commencé à déballer sa valise.
A1 preposition /ˈʌndər/

under

sous
Meaning
in or to a lower position than something
Example
The cat is under the table.
Le chat est sous la table.
A1 noun /ˈʌŋkəl/

uncle

oncle
Meaning
the brother of one's father or mother
Example
My uncle is visiting us next week.
Mon oncle nous rendra visite la semaine prochaine.
B1 adjective /ʌnˈfrɛndli/

unfriendly

peu aimable
Meaning
not kind or welcoming; hostile or cold in behavior or attitude
Example
The shop owner seemed unfriendly to new customers.
Le propriétaire du magasin semblait peu aimable envers les nouveaux clients.
C1 adjective /ˌʌnbɪˈkʌmɪŋ/

unbecoming

inapproprié
Meaning
Not proper or appropriate for a person; unsuitable.
Example
His rude behavior was unbecoming of a leader.
Son comportement grossier était inapproprié pour un leader.
C1 verb /ʌnˈmɑːsk/

unmask

démasquer
Meaning
to remove a mask or covering; to reveal the true identity, nature, or intentions of someone or something
Example
The investigation helped unmask the real culprit behind the crime.
L’enquête a permis de démasquer le vrai coupable du crime.
C1 noun /ˌjuːnɪˈfɔːrməti/

Uniformity

uniformité; consistance; égalité
Meaning
the quality of being uniform; consistency or sameness
Example
The uniformity of the design created a pleasing visual effect.
L'uniformité du design a créé un effet visuel attrayant.
C1 noun /ˌʌl.tɪˈmeɪ.təm/

Ultimatum

ultimatum
Meaning
a final demand or statement of terms, the rejection of which will result in retaliation
Example
The boss gave him an ultimatum: improve or be fired.
Le patron lui a donné un ultimatum : améliorez-vous ou vous serez renvoyé.
B2 noun /ʌnˈsɜːrtənti/

Uncertainty

incertitude; doute ou manque de certitude
Meaning
the state of being uncertain; doubt or lack of sureness
Example
The uncertainty about the weather delayed our trip.
L'incertitude sur la météo a retardé notre voyage.
B1 noun /juːˈten.səlz/

Utensils

ustensiles
Meaning
tools or implements used for cooking, eating, or serving food
Example
Please wash all the cooking utensils after preparing dinner.
Veuillez laver tous les ustensiles de cuisine après avoir préparé le dîner.
C2 adjective /ʌnˈwiːldi/

unwieldy

difficile à manipuler
Meaning
Difficult to carry or move because of its size, shape, or weight.
Example
The box was too unwieldy to carry up the stairs.
La boîte était trop difficile à manipuler pour être montée dans les escaliers.
C1 noun ˈʌp.raɪ.zɪŋ

uprising

soulèvement
Meaning
An act of resistance or rebellion; a revolt against an authority or government.
Example
The uprising marked the beginning of the revolution.
Le soulèvement a marqué le début de la révolution.
B1 adjective /ʌnˈpɒpjʊlə/

unpopular

impopulaire
Meaning
not liked or supported by many people
Example
The decision was unpopular with the public.
La décision était impopulaire auprès du public.
A1 verb /juːz/

use

utiliser
Meaning
to employ something for a purpose; to take advantage of
Example
I use my computer for work and entertainment.
J'utilise mon ordinateur pour travailler et me divertir.
B1 adjective /ʌnˈplɛz.ənt/

Unpleasant

désagréable
Meaning
not giving or causing pleasure; disagreeable
Example
The medicine had an unpleasant taste.
Le médicament avait un goût désagréable.
C2 adjective ˌʌn.əˈseɪ.lə.bəl

unassailable

inaccessible
Meaning
Unable to be attacked, questioned, or defeated.
Example
An unassailable position ensures dominance.
Une position inaccessible assure la domination.
C1 adjective /ʌnˈkwaɪ.ət/

Unquiet

agité; anxieux; perturbé
Meaning
restless; unable to remain still or quiet; anxious or troubled
Example
She spent an unquiet night worrying about the exam results.
Elle a passé une nuit agitée à s'inquiéter des résultats de l'examen.
B1 adjective /ʌnˈnesəseri/

Unnecessary

inutile; superflu
Meaning
not needed; not required; pointless
Example
The meeting was unnecessary since all decisions were already made.
La réunion était inutile puisque toutes les décisions avaient déjà été prises.
C2 adjective /ˌʌnɪmˈpiːtʃəbl/

unimpeachable

irréprochable
Meaning
Not able to be doubted, questioned, or criticized; completely trustworthy.
Example
She is known for her unimpeachable honesty.
Elle est connue pour son honnêteté irréprochable.
B1 noun /ˈjuːs.fəl.nəs/

Usefulness

utilité
Meaning
the quality of being useful; practical value or helpfulness
Example
The usefulness of this tool became apparent during the project.
L'utilité de cet outil est devenue évidente pendant le projet.
B2 noun /ʌnˈrest/

Unrest

agitation; troubles; désordre social ou politique
Meaning
a state of dissatisfaction and disturbance; social or political disorder
Example
The economic crisis led to widespread social unrest.
La crise économique a conduit à une agitation sociale généralisée.
C2 adjective /ʌnˈtiːtʃəbəl/

unteachable

impossible à enseigner
Meaning
not able or willing to learn; resistant to instruction or guidance
Example
He was so stubborn that he became almost unteachable.
Il était si têtu qu’il est devenu presque impossible à enseigner.
C2 adjective /ʌnˈwəʊntɪd/

unwonted

inhabituel
Meaning
Unusual, uncommon, or out of the ordinary.
Example
She spoke with an unwonted gentleness that surprised everyone.
Elle parla avec une douceur inhabituelle qui surprit tout le monde.
B2 adjective /ʌnˈfeɪ.vər.ə.bəl/

Unfavourable

défavorable; adverse
Meaning
not helpful or advantageous; adverse
Example
The weather conditions were unfavourable for our outdoor event.
Les conditions météorologiques étaient défavorables pour notre événement extérieur.
C1 adjective /ʌnˈtaɪərɪŋ/

Untiring

inlassable; persévérant; infatigable
Meaning
continuing without stopping; persistent; tireless
Example
Her untiring efforts finally led to success.
Ses efforts inlassables ont finalement conduit au succès.
C1 adjective /ʌnˈɜːrθli/

unearthly

surnaturel
Meaning
Strange or unnatural in a way that seems not of this world
Example
The forest was filled with an unearthly glow.
La forêt était remplie d'une lueur surnaturelle.
B2 noun ˈjuːnəti

unity

unité
Meaning
The state of being united or joined as a whole.
Example
Unity among people led to victory.
L'unité entre les gens a conduit à la victoire.
B2 verb /ɜːrdʒ/

urge

exhorter
Meaning
to strongly encourage or try to persuade someone to do something
Example
Doctors urge patients to exercise regularly.
Les médecins exhortent les patients à faire de l'exercice régulièrement.
C1 adjective /ˌʌnˈɪntɪmeɪtɪŋ/

unintimating

sans indices
Meaning
Not giving a hint or suggestion; not indicating.
Example
His unintimating tone gave no clue of his true feelings.
Son ton sans indices n'a donné aucun indice de ses véritables sentiments.
C2 adjective /ˌʌltrəˈmɒnteɪn/

ultramontane

partisan du Pape
Meaning
beyond the mountains, especially referring to support for the Pope over local church authority
Example
The debate highlighted the ultramontane position in church politics.
Le débat a mis en lumière la position ultramontaine dans la politique ecclésiastique.
B1 adjective /ʌnˈfɔːr.tʃən.ət/

Unfortunate

malheureux; regrettable
Meaning
having bad luck; regrettable or unlucky
Example
It was unfortunate that the meeting was cancelled at the last minute.
C'était malheureux que la réunion ait été annulée à la dernière minute.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

impardonnable
Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
Sa trahison était un délit impardonnable.
B2 adjective /ʌnˈɡreɪt.fəl/

Ungrateful

ingrat
Meaning
not feeling or showing thanks for something done or given; not appreciating kindness
Example
She felt he was ungrateful for all the help she had given him.
Elle sentit qu'il était ingrat pour toute l'aide qu'elle lui avait donnée.
C1 adjective /ˌʌndərˈsaɪzd/

undersized

sous-dimensionné
Meaning
Smaller than the usual or expected size.
Example
The undersized puppy struggled to keep up with its siblings.
Le chiot sous-dimensionné avait du mal à suivre ses frères et sœurs.
C1 adjective /ʌnˈsɜːrvɪsəbəl/

Unserviceable

hors service; défectueux
Meaning
not in working order; unable to be used; defective
Example
The old computer became unserviceable after the system crash.
L'ancien ordinateur est devenu hors service après la panne du système.
B2 noun /juːˈtɪl.ə.ti/

Utility

utilité; bénéfice; service public
Meaning
the state of being useful, profitable, or beneficial; a public service
Example
The utility of solar panels increases with rising electricity costs.
L'utilité des panneaux solaires augmente avec la hausse des coûts de l'électricité.
B1 adjective /ˈʌpər/

upper

supérieur
Meaning
higher in position or rank
Example
The upper floor of the building is under renovation.
Le étage supérieur du bâtiment est en rénovation.
B2 noun /ˌʌndəˈɡrædʒuət/

undergraduate

étudiant de premier cycle
Meaning
a student who has not yet earned a bachelor's degree
Example
She is an undergraduate studying computer science.
Elle est une étudiante de premier cycle étudiant en informatique.
B1 adjective /ˈʌpˌkʌmɪŋ/

upcoming

à venir
Meaning
about to happen or appear
Example
The upcoming event will be held next week.
L'événement à venir aura lieu la semaine prochaine.
B1 adjective /ʌnˈjuzd/

Unused

non utilisé; inutilisé
Meaning
not being used; not having been used before
Example
There are many unused rooms in this old mansion.
Il y a beaucoup de pièces inutilisées dans ce vieux manoir.
B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

inhabituel; étrange;
Meaning
not typical; strange; different from what is normal
Example
She wore an unusual dress to the party.
Elle portait une robe inhabituelle à la fête.
B2 adjective /ʌnˈfɪt/

Unfit

inapte; inapproprié;
Meaning
not in good physical condition; unsuitable or inappropriate
Example
He was declared unfit for military service due to his poor health.
Il a été déclaré inapte pour le service militaire en raison de sa mauvaise santé.
C1 adjective /ˌʌnɪˈkwɪvəkəl/

unequivocal

sans équivoque
Meaning
Leaving no doubt; clear and unambiguous
Example
She gave an unequivocal answer to the question.
Elle a donné une réponse sans équivoque à la question.
C1 adjective /ʌlˈtɪəriər/

ulterior

motif caché
Meaning
hidden or secret, often with a selfish motive
Example
He invited her with an ulterior motive.
Il l'a invitée avec un motif caché.
B1 noun /ˌʌnɪmˈplɔɪmənt/

Unemployment

chômage
Meaning
the state of being unemployed; lack of paid work
Example
The unemployment rate has increased significantly this year.
Le taux de chômage a augmenté de manière significative cette année.
A1 noun /ˌjuːnɪˈvɜːrsɪti/

university

université
Meaning
an institution of higher education and research, which grants academic degrees
Example
She is studying law at the university.
Elle étudie le droit à l'université.
C2 noun /ʌnˈkloʊðɪŋ/

unclothing

déshabillage
Meaning
the act or process of removing clothing
Example
The child quickly ran inside for unclothing after playing in the mud.
L'enfant est rapidement allé à l'intérieur pour le déshabillage après avoir joué dans la boue.
C1 adjective /ʌnˈsɪvəl/

Uncivil

incivil; impoli;
Meaning
not polite or courteous; rude and discourteous in behavior
Example
His uncivil remarks during the meeting offended everyone present.
Ses remarques inciviles lors de la réunion ont offensé tout le monde présent.
B2 adjective /ʌnˈkɒmən/

uncommon

inhabituel
Meaning
rare, unusual, or remarkable
Example
It is uncommon to see snow in this region.
Il est rare de voir de la neige dans cette région.
B1 adjective ʌnˈplænd

unplanned

non planifié
Meaning
Not planned or arranged in advance; happening spontaneously without preparation.
Example
Unplanned urbanization contributes to environmental issues.
L'urbanisation non planifiée contribue à des problèmes environnementaux.
B1 adjective /ʌnˈlaɪkli/

Unlikely

improbable; peu probable
Meaning
not likely to happen; improbable
Example
It's unlikely to rain today with such clear skies.
Il est peu probable qu'il pleuve aujourd'hui avec un ciel aussi dégagé.
C2 verb /ˌʌn.dɪˈsiːv/

undeceive

désillusionner
Meaning
To free someone from a misconception or false belief.
Example
She tried to undeceive him about the false rumors.
Elle a essayé de le désillusionner au sujet des fausses rumeurs.
B2 adjective /ʌnˈfeɪv(ə)rəbəl/

unfavorable

défavorable
Meaning
not beneficial or advantageous; showing disapproval or opposition
Example
The proposal received an unfavorable response from the committee.
La proposition a reçu une réponse défavorable du comité.
C1 adjective /ʌnˈsəʊʃəbl/

unsociable

asocial
Meaning
not enjoying the company of others; avoiding social interaction
Example
He became unsociable after moving to a new city.
Il est devenu asocial après avoir déménagé dans une nouvelle ville.
B1 adjective /ʌnˈtru/

Untrue

faux; incorrect
Meaning
not true; false; incorrect
Example
His statement about the incident was completely untrue.
Sa déclaration sur l'incident était complètement fausse.
C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

inconstitutionnel
Meaning
not in accordance with a political constitution; violating constitutional principles
Example
The court declared the new law unconstitutional.
Le tribunal a déclaré que la nouvelle loi était inconstitutionnelle.
C1 adjective /ʌnˈtaɪmli/

Untimely

prématuré
Meaning
happening at an inappropriate or inconvenient time; premature
Example
His untimely death at the age of thirty shocked everyone.
Sa mort prématurée à l'âge de trente ans a choqué tout le monde.
C1 adjective /ʌnˈwɪtɪŋ/

unwitting

involontaire
Meaning
Not aware of what is happening; done without realizing.
Example
She became an unwitting participant in the scam.
Elle est devenue une participante involontaire dans l'escroquerie.
B2 adjective /ˌʌndɪˈstɜːrbd/

Undisturbed

ininterrompu
Meaning
not interrupted or interfered with; calm and peaceful
Example
She slept undisturbed for eight hours.
Elle a dormi huit heures sans être dérangée.
B2 adjective /ˌʌndɪˈnaɪəbl/

Undeniable

indéniable
Meaning
impossible to deny or dispute; clearly true
Example
The evidence of his guilt was undeniable.
La preuve de sa culpabilité était indéniable.
C1 noun /juːˈtoʊpiə/

utopia

utopie
Meaning
An imagined perfect society or place where everything is ideal.
Example
Many philosophers dreamed of creating a utopia for humanity.
De nombreux philosophes ont rêvé de créer une utopie pour l'humanité.
A2 adjective /ʌnˈhel.θi/

Unhealthy

malsain; pas sain
Meaning
harmful to health; not in good health; detrimental to well-being
Example
Eating too much fast food is unhealthy for your body.
Manger trop de fast food est malsain pour ton corps.
C1 adjective /juːˈbɪkwɪtəs/

ubiquitous

omniprésent
Meaning
Existing or being everywhere at the same time.
Example
Social media has become ubiquitous among young people.
Les médias sociaux sont devenus omniprésents parmi les jeunes.
B1 adjective /ˌʌnˈɪntrəstɪŋ/

uninteresting

ennuyeux
Meaning
not holding attention or curiosity; boring
Example
The lecture was uninteresting and difficult to stay focused on.
La conférence était ennuyeuse et difficile à suivre.
C1 adjective /ʌnˈɡɑː.dɪd/

Unguarded

sans défense, négligent
Meaning
not protected or defended; careless about revealing private thoughts or information
Example
In an unguarded moment, she revealed her true feelings about the project.
Dans un moment sans défense, elle a révélé ses véritables sentiments à propos du projet.
C1 adjective /ʌnˈkʌltʃəd/

Uncultured

incivilisé; sans éducation
Meaning
lacking good manners, refinement, or education; uncivilized
Example
His uncultured behavior embarrassed everyone at the dinner party.
Son comportement incivilisé a embarrassé tout le monde à la fête.
C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

facturer moins
Meaning
To charge less than the correct or fair amount.
Example
The shopkeeper accidentally undercharged me for the groceries.
Le commerçant m'a accidentellement facturé moins pour les courses.
B2 adjective /ˌʌnɪnˈfɔːrmd/

uninformed

mal informé
Meaning
lacking knowledge or awareness about a particular subject; not educated or informed
Example
The decision was made by an uninformed committee.
La décision a été prise par un comité mal informé.
A2 preposition /əˈpɒn/

upon

sur
Meaning
on or immediately after
Example
Upon hearing the news, he rushed to the hospital.
En entendant la nouvelle, il se précipita à l'hôpital.
C2 noun /juːˌtɪlɪˈtɛəriənɪzəm/

utilitarianism

utilitarisme
Meaning
The ethical theory that actions are right if they are useful or for the benefit of the majority.
Example
Utilitarianism suggests that we should act to maximize overall happiness.
L'utilitarisme suggère que nous devrions agir pour maximiser le bonheur global.
B2 noun /ˌʌnəˌveɪləˈbɪləti/

unavailability

indisponibilité
Meaning
The state of being not available or not accessible.
Example
The unavailability of the manager caused a delay in the project.
L'indisponibilité du gestionnaire a causé un retard dans le projet.
B2 adjective /ˌʌnəˈveɪləbəl/

unavailable

indisponible
Meaning
Not able to be obtained, reached, or used; not present or accessible.
Example
The manager was unavailable to take calls during the meeting.
Le directeur n'était pas disponible pour répondre aux appels pendant la réunion.
B2 adjective /ˌʌnrɪˈzɒlvd/

unresolved

non résolu
Meaning
not solved or settled; remaining undecided or unclear
Example
The dispute remains unresolved despite several meetings.
Le conflit reste non résolu malgré plusieurs réunions.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

ininterrompu
Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
Ses efforts ininterrompus ont finalement porté leurs fruits.
B1 adjective /ˈɜːrdʒənt/

Urgent

urgent
Meaning
requiring immediate action or attention; pressing
Example
The patient needs urgent medical attention.
Le patient a besoin d'une attention médicale urgente.
B1 adjective /ˈjuːnɪfɔːrm/

Uniform

uniforme
Meaning
consistent; identical; standardized
Example
All students must wear a uniform to school.
Tous les étudiants doivent porter un uniforme à l'école.
C2 verb /ʌpˈhiːv/

upheave

soulever
Meaning
to lift or raise something forcefully; to cause to rise suddenly
Example
The workers had to upheave the heavy stone to clear the path.
Les travailleurs ont dû soulever la grosse pierre pour dégager le chemin.
C2 noun/verb /ˈʌpˌkæst/

upcast

lancer vers le haut
Meaning
Verb: To cast or throw upward. Noun: Something thrown or directed upward.
Example
The fisherman upcast his net into the air.
Le pêcheur a lancé son filet dans les airs.
B1 adjective /ˌʌndərˈstændəbl/

understandable

compréhensible
Meaning
Able to be understood; reasonable or justifiable.
Example
Her reaction was understandable given the situation.
Sa réaction était compréhensible étant donné la situation.
B1 adjective /juːˈnaɪtɪd/

United

unis; ensemble; d'accord
Meaning
joined together for a common purpose; in agreement
Example
The team was united in their goal to win.
L'équipe était unie dans son objectif de gagner.
C1 verb /ʌnˈrævəl/

unravel

démêler
Meaning
To undo twisted or knitted threads; to solve or explain something complicated.
Example
The detective worked hard to unravel the mystery.
Le détective a travaillé dur pour démêler le mystère.
B2 verb /ˌʌndərˈteɪk/

undertake

entreprendre
Meaning
to commit to and begin a task or project; to take on responsibility
Example
She decided to undertake a challenging project.
Elle a décidé de entreprendre un projet difficile.
C2 adjective /ʌnˈtræməld/

untrammeled

liberté illimitée
Meaning
Not restricted or hampered; free and unrestricted.
Example
She enjoyed untrammeled freedom in her new life abroad.
Elle a apprécié la liberté illimitée dans sa nouvelle vie à l'étranger.
B2 adjective /juːˈnæn.ɪ.məs/

Unanimous

unanime
Meaning
fully in agreement; shared by all
Example
The committee reached a unanimous decision.
Le comité a pris une décision unanime.
C2 adverb /ʌnˈɜːrɪŋli/

unerringly

sans erreur
Meaning
Without making any mistakes; always accurate
Example
The archer aimed unerringly at the target.
L'archer a visé sans erreur la cible.
C1 adjective /ʌnˈsteɪtɪd/

unstated

non exprimé
Meaning
not expressed directly in words; implied or left unsaid
Example
The contract included several unstated expectations.
Le contrat incluait plusieurs attentes non exprimées.
B2 adjective /ʌnfəˈmɪl.jər/

Unfamiliar

inconnu; étrange
Meaning
not known or recognized; strange
Example
The city was unfamiliar to me since I had never been there before.
La ville m'était inconnue car je n'y étais jamais allé avant.
C1 verb /ˌʌndərˈvæljuː/

undervalue

sous-estimer
Meaning
To assign too low a value or importance to something or someone.
Example
She felt that her boss consistently undervalued her contributions.
Elle sentait que son patron ne valorisait pas constamment ses contributions.
B2 adjective /ʌnˈlɪmɪtɪd/

unlimited

illimité
Meaning
without any limits or restrictions
Example
The internet plan offers unlimited data for the whole month.
Le plan Internet offre des données illimitées pendant tout le mois.
B1 adjective /ʌnˈmærid/

unmarried

célibataire
Meaning
Not married; single.
Example
He is thirty-five and still unmarried.
Il a trente-cinq ans et il est toujours célibataire.
B2 adverb /ˈʌt.ə.li/

Utterly

totalement; absolument; complètement
Meaning
completely; absolutely; totally
Example
The movie was utterly boring and I fell asleep.
Le film était complètement ennuyeux et je me suis endormi.
B2 adjective /ʌnˈwaɪz/

unwise

imprudent
Meaning
Showing poor judgment; not sensible or prudent.
Example
It would be unwise to invest all your money in one company.
Il serait imprudent d'investir tout votre argent dans une seule entreprise.
B1 adjective /ʌnˈfeər/

Unfair

injuste; déloyal;
Meaning
not right or just; treating people in a way that favors some over others
Example
It's unfair to blame her for something she didn't do.
C'est injuste de la blâmer pour quelque chose qu'elle n'a pas fait.
B1 adjective /ˌʌnɪkˈspektɪd/

Unexpected

inattendu; surprenant
Meaning
not expected or anticipated; surprising
Example
The unexpected news left everyone speechless.
Les nouvelles inattendues ont laissé tout le monde sans voix.
C1 adjective /ʌnˈkæni/

uncanny

étrange
Meaning
Strange or mysterious, especially in an unsettling way.
Example
She has an uncanny ability to predict the future.
Elle a une étrange capacité à prédire l'avenir.
B2 adjective /ˌʌnprɪˈdɪktəbəl/

unpredictable

imprévisible
Meaning
not able to be predicted; changing suddenly and unexpectedly
Example
The weather in this region is highly unpredictable.
Le climat de cette région est très imprévisible.
B1 adverb /ʌnˈjuːʒuəli/

unusually

de manière inhabituelle
Meaning
in a way that is not typical or expected; to an uncommon degree
Example
It was unusually cold for this time of year.
Il faisait inhabituellement froid pour cette période de l'année.
B2 noun /ʌnəˈbɪləti/

unability

incapacité
Meaning
the state of being unable to do something; incapacity
Example
His unability to solve the problem caused delays in the project.
Son incapacité à résoudre le problème a causé des retards dans le projet.
B2 adjective /ʌnˈkwɒl.ɪ.faɪd/

Unqualified

incompétent; non qualifié;
Meaning
not having the necessary skills or qualifications; complete or absolute
Example
He was unqualified for the engineering position due to lack of experience.
Il était inqualifié pour le poste d'ingénieur en raison de son manque d'expérience.
C2 verb /ˈʌndərˌmæn/

underman

manquer de personnel
Meaning
to supply with fewer workers or personnel than needed
Example
The hospital was undermanned during the flu outbreak.
L'hôpital était sous-effectif pendant l'épidémie de grippe.
B2 adjective /ˌʌn.əkˈsep.tə.bəl/

Unacceptable

inacceptable
Meaning
not satisfactory or allowable; not acceptable
Example
The quality of work was completely unacceptable.
La qualité du travail était complètement inacceptable.
B2 verb /ʌpˈhoʊld/

uphold

maintenir
Meaning
to maintain or support a principle, law, or decision
Example
The judge promised to uphold justice at all costs.
Le juge a promis de maintenir la justice à tout prix.
A1 pronoun /ʌs/

us

nous
Meaning
used to refer to the speaker and one or more other people as the object of a verb or preposition
Example
She gave us a gift.
Elle nous a donné un cadeau.
C1 adjective /ˌʌndərˈsteɪtɪd/

understated

sous-estimé
Meaning
Presented in a subtle and restrained way.
Example
She wore an elegant but understated dress.
Elle portait une robe élégante mais sous-estimée.
C1 adjective /ʌnˈskeɪðd/

unscathed

sain et sauf
Meaning
Without suffering any injury, damage, or harm.
Example
She escaped from the accident unscathed.
Elle a échappé à l'accident saine et sauve.
C1 adjective /ˌjuːtɪlɪˈtɛəriən/

utilitarian

utilitaire
Meaning
Designed to be useful or practical rather than attractive; relating to the doctrine that actions are right if they are useful or for the benefit of a majority.
Example
The building had a simple utilitarian design.
Le bâtiment avait une conception utilitaire simple.
B2 adjective /ʌnˈθɪŋkəbl/

Unthinkable

impensable
Meaning
impossible to conceive or imagine; beyond belief or consideration
Example
It was unthinkable that such a tragedy could happen in our peaceful town.
Il était impensable qu'une telle tragédie puisse se produire dans notre ville paisible.
C1 verb /ʌpˈruːt/

uproot

déraciner
Meaning
To pull something out of the ground; to remove or displace completely.
Example
They uprooted the old tree from the garden.
Ils ont déraciné l'arbre vieux du jardin.
C1 noun ˌʌndərˈprɪvəlɪdʒd ɡruːps

underprivileged groups

groupes défavorisés
Meaning
Groups of people who lack basic necessities or advantages that are available to other members of society.
Example
Underprivileged groups benefit from social initiatives.
Les groupes défavorisés bénéficient des initiatives sociales.
B2 adjective /ˌʌnˈnoʊ.tɪst/

Unnoticed

inaperçu; ignoré
Meaning
not seen or observed; ignored
Example
His hard work went unnoticed by his manager.
Son travail acharné est passé inaperçu par son manager.
C1 adjective /ʌnˈtɛnəbl/

untenable

intenable
Meaning
not able to be maintained or defended against attack or objection
Example
The politician resigned when his position became untenable.
Le politicien a démissionné lorsque sa position est devenue intenable.
C1 noun /ˈʌp.tɜːn/

upturn

amélioration
Meaning
An improvement or upward trend in a situation, especially in business or economy.
Example
The company experienced an upturn in sales last quarter.
L'entreprise a connu une amélioration des ventes le dernier trimestre.
C1 adjective /ˌʌnəbˈtruːsɪv/

unobtrusive

discret
Meaning
not attracting attention; blending in without causing notice
Example
The security cameras are designed to be unobtrusive.
Les caméras de sécurité sont conçues pour être discrètes.
B2 adjective /ˌʌnəˈweər/

Unaware

inconscient; ignorant; sans savoir
Meaning
not knowing or realizing; having no knowledge of something
Example
She was completely unaware of the danger.
Elle était complètement inconsciente du danger.
C2 noun /ˈʌm.brə/

Umbra

ombre totale, région sombre d'une tache solaire
Meaning
the fully shaded inner region of a shadow cast by an opaque object; the dark center of a sunspot
Example
During the eclipse, we stood in the moon's umbra.
Pendant l'éclipse, nous nous sommes tenus dans l'ombre de la lune.