Unrest
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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.
B2 adjective /ʌnˈdɪvaɪdɪd/

Undivided

Indivisé; complet; pas séparé ou divisé
Meaning
whole; complete; not separated or split
Example
The team showed undivided attention to the coach's instructions.
L'équipe a montré une attention indivisée aux instructions de l'entraîneur.
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.
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.
B2 adverb juːˈnæn.ɪ.məs.li

unanimously

unanime
Meaning
With the agreement of all people involved; without opposition.
Example
The proposal was unanimously accepted.
La proposition a été acceptée à l'unanimité.
A2 noun /ˈjuːnɪt/

unit

unité
Meaning
an individual thing or person regarded as a single and complete entity
Example
Each unit in the production line is carefully tested.
Chaque unité de la ligne de production est soigneusement testée.
B1 noun /ˈjuːnɪvɜːrs/

Universe

univers
Meaning
all existing matter and space; the cosmos
Example
Scientists study the universe to understand its mysteries.
Les scientifiques étudient l'univers pour comprendre ses mystères.
C2 noun /ˈjuːnɪvəˌlɛns/

univalence

univalence
Meaning
The state of having a single valence or combining power, especially in chemistry.
Example
Hydrogen is characterized by its univalence in chemical reactions.
L'hydrogène est caractérisé par son univalence dans les réactions chimiques.
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.
C1 adjective /ˌʌnəˈteɪnəbl/

unattainable

inaccessible
Meaning
impossible to achieve, reach, or accomplish
Example
For many, becoming a professional athlete remains an unattainable dream.
Pour beaucoup, devenir un athlète professionnel reste un rêve inaccessible.
B1 adjective /ʌnˈʃʊr/

unsure

incertain
Meaning
not certain or confident; feeling doubt
Example
She felt unsure about the decision.
Elle était incertaine à propos de la décision.
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.
B1 preposition, adverb, adjective /ˌʌndərˈniːθ/

underneath

sous, en dessous
Meaning
Located directly below or beneath something
Example
The keys were hidden underneath the pile of papers.
Les clés étaient cachées sous la pile de papiers.
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.
B2 verb /ˌʌndərˈmaɪn/

undermine

saper
Meaning
to gradually weaken or damage something or someone
Example
Constant criticism can undermine a child's confidence.
Les critiques constantes peuvent saper la confiance d'un enfant.
C1 adjective /ʌnˈmænɪdʒəbəl/

Unmanageable

ingérable; hors de contrôle
Meaning
difficult or impossible to control or handle
Example
The large class became unmanageable without proper supervision.
La grande classe est devenue ingérable sans une supervision adéquate.
C1 adjective /ʌnˈkleɪmd/

Unclaimed

non réclamé; non demandé; abandonné ou sans propriétaire
Meaning
not claimed by anyone; not demanded or requested; abandoned or ownerless
Example
The unclaimed luggage was stored in the airport's lost property department.
Les bagages non réclamés ont été stockés dans le département des objets trouvés de l'aéroport.
B2 verb /ˌʌndərˈɛstɪmeɪt/

underestimate

sous-estimer
Meaning
To judge something as less important or smaller than it really is.
Example
Never underestimate the power of teamwork.
Ne sous-estimez jamais la puissance du travail d'équipe.
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 /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.
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.
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 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 /ʌnˈbiːtən/

Unbeaten

invaincu; non défait
Meaning
not defeated; having never lost; undefeated
Example
The team remains unbeaten this season.
L'équipe reste invaincue cette saison.
C1 adjective /ʌnˈtʃælɪndʒd/

Unchallenged

incontesté; accepté sans opposition; sans rival
Meaning
not disputed or questioned; accepted without opposition; having no rival
Example
He remained the unchallenged champion for five years.
Il est resté le champion incontesté pendant cinq ans.
B1 adjective /ˌʌnbɪˈliːvəbəl/

Unbelievable

incroyable
Meaning
impossible to believe; extremely surprising or remarkable
Example
The magician's performance was absolutely unbelievable.
La performance du magicien était absolument incroyable.
B1 adjective /ʌnˈsɜːrtən/

Uncertain

incertain
Meaning
not able to be relied on; not known or definite; not having reliable knowledge
Example
I am uncertain about my future career plans.
Je suis incertain de mes plans de carrière futurs.
B2 adjective /ʌnˈhɛlpfəl/

unhelpful

inutile
Meaning
not providing help or support; making a situation harder rather than easier
Example
His unhelpful attitude slowed down the entire project.
Son attitude inutile a ralenti tout le projet.
A1 adverb /ʌp/

up

en haut
Meaning
towards a higher position or level
Example
He climbed up the ladder quickly.
Il a monté rapidement l'échelle.
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.
B1 verb /ʌnˈræp/

unwrap

déballer
Meaning
remove wrapping or covering from something; reveal something gradually or clearly
Example
She carefully unwrapped the gift with excitement.
Elle a déballé le cadeau avec précaution et excitation.
C2 verb /ʌnˈkaʊtʃ/

uncouch

retirer du canapé (usage rare)
Meaning
to remove from a couch or to release from being laid down (rare/archaic usage)
Example
The surgeon attempted to uncouch the cataract.
Le chirurgien a tenté d'enlever la cataracte.
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.
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.
C1 verb /ʌnˈɜːθ/

unearth

déterrer
Meaning
To dig up from the ground or to discover something hidden.
Example
Archaeologists unearthed ancient artifacts at the site.
Les archéologues ont déterré des artefacts anciens sur le site.
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.
C1 noun /ʌnˈfeɪθfʊlnəs/

unfaithfulness

infidélité
Meaning
the quality of being disloyal or not faithful; breach of trust or fidelity
Example
His unfaithfulness led to the end of their marriage.
Son infidélité a conduit à la fin de leur mariage.
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.
C1 adjective /ˌʌnəˈfɛktɪd/

unaffected

insensible, naturel
Meaning
Not influenced or touched by something; genuine and natural.
Example
He remained unaffected by the criticism and kept working hard.
Il est resté impassible face à la critique et a continué à travailler dur.
C2 adjective /juːˈnɪsənənt/

unisonant

harmonieux
Meaning
Sounding together or in harmony.
Example
The unisonant voices created a powerful effect.
Les voix harmonieuses ont créé un effet puissant.
C1 adjective /ʌnˈsəʊʃəl/

unsocial

asocial
Meaning
not enjoying the company of others; avoiding social interaction; contrary to social norms
Example
He prefers unsocial hours so he can work alone without interruptions.
Il préfère des horaires asociaux pour travailler seul.
B2 adjective /ʌnˈwɪl.ɪŋ/

Unwilling

réticent; récalcitrant;
Meaning
not ready to do something; reluctant; not wanting to do
Example
He was unwilling to share his secret with anyone.
Il ne voulait pas partager son secret avec qui que ce soit.
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 /ˌʌltrəˈmʌndeɪn/

ultramundane

ultramondain
Meaning
Relating to things beyond the physical world; supernatural or transcendental.
Example
Philosophers often discuss ultramundane realities beyond human perception.
Les philosophes discutent souvent des réalités ultramondaines au-delà de la perception humaine.
B2 adjective /ʌnˈiːkwəl/

Unequal

inégal; injuste;
Meaning
not the same in quantity, size, or value; not fair or just
Example
The distribution of wealth is unequal in many countries.
La distribution de la richesse est inégale dans de nombreux pays.
C2 adjective /ˌʌnəˈʃʊəd/

unassured

incertain
Meaning
Lacking confidence or certainty.
Example
She gave an unassured answer during the interview.
Elle a donné une réponse incertaine lors de l'entretien.
C2 noun /ˈʌp.wel.ɪŋ/

upwelling

Un phénomène océanographique impliquant le mouvement de l'eau dense, froide et riche en nutriments vers la surface de l'océan.
Meaning
An oceanographic phenomenon that involves wind-driven motion of dense, cooler, and nutrient-rich water towards the ocean surface.
Example
Upwelling brings nutrients to the ocean surface.
L'upwelling apporte des nutriments à la surface de l'océan.
B2 verb /ˈjuːtɪlaɪz/

utilize

utiliser
Meaning
to make practical or effective use of something
Example
The company aims to utilize solar energy for production.
L'entreprise vise à utiliser l'énergie solaire pour la production.
C1 adjective /ˌʌnrɪˈkwaɪtɪd/

unrequited

non réciproque
Meaning
Not returned or reciprocated, especially in the context of love or affection.
Example
He suffered from unrequited love for years.
Il a souffert d'un amour non réciproque pendant des années.
B1 verb /juˈnaɪt/

unite

unir
Meaning
to join together or combine; to bring people or things together
Example
The crisis helped unite the community.
La crise a aidé à unir la communauté.
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.
C2 adjective /ˌʌn.təˈwɔːrd/

untoward

inattendu
Meaning
Unexpected and inappropriate or inconvenient.
Example
The meeting ended without any untoward incidents.
La réunion s'est terminée sans incidents inattendus.
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.
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.
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 /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.
C1 verb /ˌʌndərˈsɛl/

undersell

vendre à un prix inférieur
Meaning
to sell something at a lower price than competitors or to downplay the value of something
Example
The shop undersold its rivals by offering huge discounts.
Le magasin a vendu à ses rivaux à un prix inférieur en offrant de grosses réductions.
B1 adjective /ʌnˈkaɪnd/

Unkind

cruel; pas gentil
Meaning
cruel; not nice or caring toward others
Example
It was unkind of him to make fun of her appearance.
C'était cruel de sa part de se moquer de son apparence.
C1 adjective /ʌnˈhoʊli/

Unholy

impie; pervers; profane
Meaning
wicked; sinful; profane
Example
The unholy alliance between the two companies caused public outrage.
L'alliance impie entre les deux entreprises a provoqué un outrage public.
B2 noun /ˈʌndərˌteɪkɪŋ/

undertaking

entreprise
Meaning
A task, project, or responsibility that someone agrees to do.
Example
Starting a new company is a difficult undertaking.
Lancer une nouvelle entreprise est une entreprise difficile.
B2 verb /ˌʌndərˈɡoʊ/

undergo

subir
Meaning
to go through something, especially something unpleasant or difficult
Example
She had to undergo surgery to recover.
Elle a dû subir une chirurgie pour se rétablir.
B2 adjective /ʌnˈberəbəl/

Unbearable

insupportable
Meaning
too painful, annoying, or unpleasant to tolerate; impossible to endure
Example
The heat in the desert was unbearable.
La chaleur dans le désert était insupportable.
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.
C1 noun /ˌʌnbɪˈliːf/

Unbelief

incrédulité
Meaning
lack of religious belief; skepticism or doubt
Example
His unbelief in the supernatural made him a skeptic.
Son incrédulité face au surnaturel l'a transformé en un sceptique.
B2 adjective /ʌnˈdʒʌst/

Unjust

injuste; incorrecte
Meaning
not fair or right; morally wrong
Example
The punishment was unjust for such a minor offense.
La punition était injuste pour une infraction mineure.
C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

extrêmement drôle
Meaning
Extremely funny or noisy; causing loud laughter or commotion.
Example
The comedian's jokes were absolutely uproarious.
Les blagues du comédien étaient absolument extrêmement drôles.
B2 adjective /ʌnˈstɛdi/

unsteady

instable
Meaning
not firm or stable; likely to change or fail
Example
She felt unsteady on her feet after the long journey.
Elle se sentait instable après le long voyage.
B2 adjective /ʌnˈsiːn/

Unseen

invisible; non vu ou remarqué auparavant
Meaning
not previously seen or noticed; invisible; hidden
Example
The unseen forces of nature can be very powerful.
Les forces invisibles de la nature peuvent être très puissantes.
C1 verb /ˌʌndəˈreɪt/

underrate

sous-estimer
Meaning
to fail to recognize the full value or importance of something or someone
Example
Many people underrate the benefits of regular exercise.
Beaucoup de gens sous-estiment les bienfaits de l'exercice régulier.
C1 noun /ˈjuːnɪsən/

unison

à l'unisson
Meaning
Simultaneous performance or utterance of action or speech.
Example
The choir sang in unison.
Le chœur a chanté à l'unisson.
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.
B2 adjective /ˈʌpˌraɪt/

Upright

honnête et moralement correct; vertical ou dressé en position
Meaning
honest and morally correct; vertical or erect in position
Example
She is known for being an upright and honest businesswoman.
Elle est connue pour être une femme d'affaires honnête et droite.
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.
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.
C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

non reconnu
Meaning
Not recognized, admitted, or accepted; ignored or unnoticed
Example
Her contributions to the project went unacknowledged.
Ses contributions au projet sont restées non reconnues.
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 adverb /ˈɜːrdʒəntli/

urgently

d'urgence
Meaning
in a way that requires immediate attention or action
Example
The patient urgently needs medical attention.
Le patient a besoin d'une attention médicale d'urgence.
B2 noun /ˈʌndərkləʊðz/

underclothes

sous-vêtements
Meaning
Clothing worn beneath outer clothes, such as underwear or lingerie
Example
He folded his underclothes neatly before packing them.
Il a plié ses sous-vêtements soigneusement avant de les ranger.
C1 adjective /ˌʌnfɔːrˈsiːn/

unforeseen

Meaning
Not anticipated or predicted; unexpected.
Example
The project faced unforeseen challenges that delayed its completion.
A2 noun /ˌʌpˈsteəz/

Upstairs

étage supérieur
Meaning
on or to an upper floor of a building; the upper floor or floors
Example
She went upstairs to her bedroom to rest.
Elle est montée à l'étage pour se reposer.
B1 adjective /ˈɜːrbən/

urban

urbain
Meaning
related to, characteristic of, or situated in a city or town
Example
Urban areas often have higher population density than rural areas.
Les zones urbaines ont souvent une densité de population plus élevée que les zones rurales.
B2 adjective /ˌʌnkənˈvɪnsɪŋ/

Unconvincing

invraisemblable
Meaning
failing to persuade or impress; not believable or credible
Example
His excuse for being late was completely unconvincing.
Son excuse pour être en retard était complètement invraisemblable.
A2 adjective /ʌnˈtaɪdi/

Untidy

désordonné; en désordre;
Meaning
not neat or orderly; messy and disorganized
Example
Her untidy room was filled with clothes scattered everywhere.
Sa chambre en désordre était remplie de vêtements éparpillés partout.
B2 adjective /ʌnˈɑːrmd/

unarmed

désarmé
Meaning
Not equipped with or carrying weapons
Example
The police found the suspect unarmed during the search.
La police a trouvé le suspect désarmé pendant la fouille.
C2 noun /ˌjuːzɜːrˈpeɪʃən/

usurpation

usurpation
Meaning
The act of taking someone's power or property illegally or by force.
Example
The general's usurpation of the presidency led to political unrest.
L'usurpation de la présidence par le général a conduit à des troubles politiques.
C2 adjective /ʌnˈfeɪnd/

unfeigned

authentique
Meaning
genuine; not pretended or insincere
Example
She expressed unfeigned joy at her friend's success.
Elle a exprimé une joie authentique lors du succès de son amie.
A2 conjunction /ʌnˈlɛs/

unless

à moins que
Meaning
except if
Example
We won't go unless it stops raining.
Nous n'irons pas à moins qu'il ne cesse de pleuvoir.
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.
C1 adjective /ʌnˈsaɪtli/

unsightly

désagréable
Meaning
Unpleasant to look at; ugly.
Example
The garbage pile created an unsightly view in the park.
Le tas d'ordures a créé une vue désagréable dans le parc.
B1 adjective /ʌnˈedjʊkeɪtɪd/

Uneducated

analphabète; non éduqué
Meaning
lacking education; not having received formal schooling or training
Example
Many uneducated workers struggle to find well-paying jobs.
Beaucoup de travailleurs analphabètes ont du mal à trouver des emplois bien rémunérés.
C2 verb /juˈzɜrp/

usurp

usurper
Meaning
to take someone's position of power illegally or by force
Example
The general tried to usurp the king's throne.
Le général a tenté de usurper le trône du roi.
C1 adjective /ʌnˈsiːmli/

unseemly

indécent
Meaning
Not proper or appropriate in behavior or appearance; unbecoming.
Example
His unseemly remarks embarrassed everyone at the dinner table.
Ses remarques indécentes ont embarrassé tout le monde à la table du dîner.
B2 adjective /ʌnˈbaɪəst/

unbiased

impartiale
Meaning
Not showing prejudice; impartial and fair.
Example
The report gave an unbiased view of the situation.
Le rapport a donné un point de vue impartial de la situation.
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.
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.
C1 adjective /ʌnˈkuːθ/

uncouth

grossier
Meaning
Lacking good manners, refinement, or grace; awkward or rough.
Example
His uncouth behavior shocked the guests at the party.
Son comportement grossier a choqué les invités à la fête.
C1 adjective /ˌʌnəˈkaʊntəbl/

unaccountable

inexplicable
Meaning
Not able to be explained or justified.
Example
She felt an unaccountable fear as she entered the dark room.
Elle ressentait une peur inexplicable en entrant dans la pièce sombre.
C1 noun /ˈʌlsər/

ulcer

ulcère
Meaning
a sore on the skin or a mucous membrane that does not heal easily
Example
The doctor prescribed medicine to treat the stomach ulcer.
Le médecin a prescrit des médicaments pour traiter l'ulcère de l'estomac.
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 adjective ˌʌn.pəˈtɜːbd

unperturbed

pas inquiet ou perturbé par quelque chose ; calme et composé
Meaning
Not worried or disturbed by something; calm and composed.
Example
She remained unperturbed despite the challenges.
Elle est restée calme malgré les défis.
C2 verb /ʌnˈkloʊð/

unclothe

déshabiller; enlever les vêtements
Meaning
to remove clothing from someone or something
Example
The nurse helped unclothe the patient for the examination.
L'infirmière a aidé à déshabiller le patient pour l'examen.
B2 adjective /ʌnˈbæləns/

Unbalanced

déséquilibré; instable
Meaning
not balanced; lacking stability or equilibrium; mentally unstable
Example
The unbalanced table kept wobbling.
La table déséquilibrée continua à osciller.
B1 adjective /juːˈniːk/

Unique

unique; singulier; rare
Meaning
being the only one of its kind; unlike anything else
Example
Every snowflake is unique in its pattern.
Chaque flocon de neige est unique dans son motif.
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.
C2 adjective /ʌnˈflæpəbəl/

unflappable

imperturbable
Meaning
calm and composed, especially in difficult situations
Example
Despite the crisis, he remained unflappable and confident.
Malgré la crise, il est resté imperturbable et confiant.
C1 adjective /ʌnˈruːli/

Unruly

désordonné; indiscipliné;
Meaning
difficult to control or manage; disorderly and disruptive
Example
The unruly crowd refused to follow the safety instructions.
La foule indisciplinée a refusé de suivre les instructions de sécurité.
C1 verb /ʌnˈnɜːrv/

unnerve

perdre confiance
Meaning
to make someone lose confidence, courage, or composure
Example
The hostile questions began to unnerve the witness.
Les questions hostiles ont commencé à déstabiliser le témoin.
C1 adjective /ˌʌnəˈdɔːrnd/

unadorned

simple, sans décorations
Meaning
Plain and simple; not decorated.
Example
The room was unadorned, with only a table and a chair.
La pièce était simple, avec seulement une table et une chaise.
C1 noun /ʌnɪmˈpɔːrtəns/

unimportance

insignifiance
Meaning
the state or quality of being insignificant or not important
Example
He dismissed the issue with a sense of unimportance.
Il a rejeté la question avec un sentiment de non-importance.
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 /ˌʌnsəkˈsesfl/

Unsuccessful

échoué; raté;
Meaning
not achieving desired aims or results; failing to accomplish a purpose
Example
His unsuccessful attempt to climb the mountain left him disappointed.
Sa tentative échouée de gravir la montagne l'a laissé déçu.
B2 adjective /ˌʌndɪˈzaɪərəbl/

Undesirable

indésirable; nuisible; désagréable
Meaning
not wanted or wished for; harmful or unpleasant
Example
The new policy had several undesirable consequences.
La nouvelle politique a eu plusieurs conséquences indésirables.
B1 verb /ˈʌpˌɡreɪd/

upgrade

mettre à jour
Meaning
to raise something to a higher standard, improve
Example
We decided to upgrade the software to the latest version.
Nous avons décidé de mettre à jour le logiciel vers la dernière version.
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.
B1 adverb /ˌʌpsaɪd ˈdaʊn/

Upside-down

à l'envers
Meaning
with the upper part at the bottom; in or into a reversed position
Example
The picture was hanging upside-down on the wall.
L'image était accrochée à l'envers sur le mur.
B2 adjective /ʌnprɪˈpɛrd/

Unprepared

impréparé
Meaning
not ready or able to deal with something
Example
He was unprepared for the difficult exam.
Il était mal préparé pour l'examen difficile.
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.
A2 noun /ˈʌndərwɛr/

Under wear

sous-vêtements
Meaning
clothing worn under other clothes, next to the skin
Example
She bought new underwear from the department store.
Elle a acheté de nouveaux sous-vêtements au magasin.
B1 adverb /ʌnˈfɔːrtʃənətli/

Unfortunately

Malheureusement
Meaning
used to express regret or disappointment about something
Example
Unfortunately, the weather was bad for our picnic.
Malheureusement, le temps était mauvais pour notre pique-nique.
B2 noun /ˈʌpˌkiːp/

up-keep

entretien
Meaning
The process or cost of maintaining something in good condition.
Example
The upkeep of the old house is very expensive.
L'entretien de la vieille maison est très cher.
C2 adjective /ʌnˈlɛtəd/

unlettered

analphabète
Meaning
lacking education or the ability to read and write; illiterate
Example
The unlettered villagers relied on oral traditions to preserve their history.
Les villageois analphabètes dépendaient des traditions orales pour préserver leur histoire.