effectuate
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C2 verb /ɪˈfɛktʃueɪt/

effectuate

effectuer
Meaning
to put into force or cause to happen; to bring about
Example
The manager effectuated the changes to improve efficiency.
Le manager a effectué les changements pour améliorer l'efficacité.
C2 adjective /ˈɛrənt/

errant

errant
Meaning
behaving wrongly or straying from the proper course or standards
Example
The teacher disciplined the errant student.
Le professeur a discipliné l'étudiant errant.
C2 noun /ɔːˈreɪʃən/

oration

discours
Meaning
A formal speech, especially one given on a ceremonial occasion
Example
The president delivered an inspiring oration.
Le président a prononcé un discours inspirant.
C2 noun /ˈniːəˌfaɪt/

neophyte

néophyte
Meaning
A beginner or novice in a subject, skill, or belief.
Example
As a neophyte in programming, she often asked for guidance from her mentor.
En tant que néophyte en programmation, elle demandait souvent des conseils à son mentor.
C2 noun /ɒmˈnɪpətəns/

omnipotence

omnipotence
Meaning
The quality of having unlimited power or authority.
Example
Many religions describe God’s omnipotence as absolute.
De nombreuses religions décrivent l'omnipotence de Dieu comme absolue.
C2 noun ˈnjʊə.rəʊ ˌfiːd.bæk

neurofeedback

une technique qui utilise les activités cérébrales en temps réel pour enseigner l'autorégulation de la fonction cérébrale
Meaning
A technique that uses real-time displays of brain activity to teach self-regulation of brain function.
Example
Neurofeedback enhances cognitive performance and relaxation.
Le neurofeedback améliore la performance cognitive et la relaxation.
C2 noun /ˈtɜːrnkoʊt/

turncoat

traître
Meaning
a person who switches allegiance, often betraying a cause or group
Example
He was branded a turncoat after joining the rival political party.
Il a été qualifié de traître après avoir rejoint le parti politique rival.
C2 adjective /ɡrʌf/

gruff

rude
Meaning
Rough or stern in manner, speech, or voice.
Example
Despite his gruff manner, he was very kind-hearted.
Malgré son comportement rude, il était très gentil.
C2 noun /neɪv/

nave

nef centrale de l'église
Meaning
the central part of a church building intended to accommodate the congregation
Example
The choir sang beautifully in the church nave.
Le chœur a chanté magnifiquement dans la nef de l'église.
C2 noun /mɛnˈdæsəti/

mendacity

faux
Meaning
the tendency to be untruthful; dishonesty
Example
The journalist exposed the mendacity of the officials.
Le journaliste a exposé la fausseté des responsables.
C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

Le processus de création et de développement de nouvelles idées ou concepts par la pensée créative et le brainstorming.
Meaning
The process of forming and developing new ideas or concepts through creative thinking and brainstorming.
Example
The team engaged in ideation sessions to generate new product ideas.
L'équipe a participé à des sessions de génération d'idées pour créer de nouvelles idées de produits.
C2 adjective /pəˈluːsɪd/

pellucid

transparent
Meaning
Transparently clear; easy to understand.
Example
The lake water was so pellucid that you could see the stones at the bottom.
L'eau du lac était tellement transparente que vous pouviez voir les pierres au fond.
C2 adjective /ˈtræktəbəl/

tractable

facile à contrôler ou influencer
Meaning
easy to control or influence
Example
The child was surprisingly tractable during the long journey.
L'enfant était étonnamment facile à contrôler pendant le long voyage.
C2 adjective /ˈpɑːrləs/

parlous

périlleux
Meaning
Full of danger or risk; precarious.
Example
The company is in a parlous financial state.
L'entreprise est dans un état financier précaire.
C2 noun /ˈdæl.i.əns/

Dalliance

flirt; aventure; liaison éphémère
Meaning
a casual romantic or sexual relationship; a brief involvement or experiment
Example
His dalliance with photography lasted only a few months before he lost interest.
Son flirt avec la photographie n'a duré que quelques mois avant qu'il perde de l'intérêt.
C2 noun /aɪˈkɒnəklæst/

iconoclast

iconoclaste
Meaning
A person who attacks or criticizes cherished beliefs, traditions, or institutions.
Example
He was known as an iconoclast who challenged old traditions.
Il était connu comme un iconoclaste qui défiait les anciennes traditions.
C2 adjective /ˌʌnpriːpəˈzɛsɪŋ/

unprepossessing

peu attrayant
Meaning
not attractive or appealing in appearance
Example
Despite his unprepossessing looks, he was very kind and intelligent.
Malgré son apparence peu attrayante, il était très gentil et intelligent.
C2 adjective /ˈpɒndərəbl/

ponderable

qui peut être considéré, pensable
Meaning
able to be considered or thought about
Example
The evidence was substantial and ponderable.
La preuve était substantielle et pensable.
C2 adjective /ˈdɪsəluːt/

dissolute

dissolu
Meaning
lacking moral restraint; indulging excessively in sensual pleasures
Example
He led a dissolute life filled with parties and gambling.
Il a mené une vie dissolue remplie de fêtes et de jeux d'argent.
C2 adjective /ˈbiːstiəl/

bestial

bestial
Meaning
Relating to beasts; showing savagery, brutality, or lacking human sensibility.
Example
The prisoners were treated in a bestial manner.
Les prisonniers ont été traités de manière bestiale.
C2 verb /ɪmˈpɛnd/

impend

se profiler
Meaning
to be about to happen; to loom threateningly
Example
Dark clouds suggested that a storm was impeding.
Les nuages sombres suggéraient qu'une tempête était imminente.
C2 noun /ˈhɛksəˌpɒd/

hexapod

hexapode
Meaning
An insect or other organism with six legs.
Example
The scientist observed a hexapod crawling on the leaf.
Le scientifique a observé un hexapode rampant sur la feuille.
C2 verb /proʊˈskraɪb/

proscribe

interdire
Meaning
to forbid something by law or authority
Example
The new law will proscribe the use of harmful chemicals in farming.
La nouvelle loi interdira l'utilisation de produits chimiques nuisibles dans l'agriculture.
C2 verb /kənˈvʌls/

convulse

secouer violemment; souffrir de contractions involontaires soudaines
Meaning
to shake violently; to suffer sudden involuntary contractions
Example
The patient convulsed during the seizure.
Le patient a convulsé pendant la crise.
C2 adjective /ˈpɔːrtli/

portly

corpulent
Meaning
Having a stout or somewhat fat body, often implying dignity or authority.
Example
The portly man entered the room with confidence.
L'homme corpulent est entré dans la pièce avec confiance.
C2 adjective /ɪˈfɛmɪnət/

effeminate

efféminé
Meaning
Having traits, tastes, or habits traditionally considered feminine, often used negatively for men.
Example
The critics described him as effeminate due to his gentle manner.
Les critiques l'ont décrit comme efféminé à cause de sa manière douce.
C2 adjective /ˈdɛsɪkeɪtɪd/

desiccated

desséché
Meaning
completely dried, having had all moisture removed
Example
The museum displayed desiccated specimens of plants.
Le musée a exposé des spécimens desséchés de plantes.
C2 noun /ˈhoʊʒəri/

hosiery

chaussettes et vêtements pour les jambes
Meaning
Stockings, socks, and other knitted clothing for the legs and feet.
Example
She bought new hosiery for the winter season.
Elle a acheté de nouveaux bas pour la saison hivernale.
C2 verb /pəˈræmbjʊˌleɪt/

perambulate

flâner
Meaning
To walk through or travel around, especially for leisure.
Example
They perambulated the old town, enjoying the sights.
Ils ont flâné dans la vieille ville, profitant des vues.
C2 noun dʒɛsˌtɪk.jʊˈleɪ.ʃənz

gesticulations

gesticulations
Meaning
Expressive hand or body movements while speaking to convey thoughts or emotions
Example
His energetic gesticulations made the speech more engaging.
Ses gesticulations énergiques ont rendu le discours plus captivant.
C2 noun /ˈfɔɪbəl/

foible

petite faiblesse
Meaning
A minor weakness or eccentricity in someone's character.
Example
She loved him despite his little foibles.
Elle l'aimait malgré ses petites faiblesses.
C2 noun /ˌækwəˈpɒnɪks/

aquaponics

aquaponie
Meaning
A system of aquaculture in which the waste produced by farmed fish or other aquatic animals supplies nutrients for plants grown hydroponically.
Example
Aquaponics efficiently utilizes water by integrating fish and plant farming.
L'aquaponie utilise l'eau efficacement en intégrant l'élevage de poissons et la culture de plantes.
C2 noun /voʊˈsɪfərəns/

vociferance

crier fort
Meaning
the act of shouting or making a loud outcry
Example
The vociferance of the protesters filled the streets.
La vocifération des manifestants a rempli les rues.
C2 adjective /dɪsˈkʌmfɪtɪŋ/

discomfiting

gênant
Meaning
Causing unease, embarrassment, or discomfort.
Example
His discomfiting questions made everyone shift uncomfortably in their seats.
Ses questions gênantes ont fait en sorte que tout le monde se déplace mal à l'aise dans leurs sièges.
C2 noun /ˈkɒliər/

collier

mineur de charbon
Meaning
a person who works in coal mines or a ship carrying coal
Example
The collier spent long hours underground extracting coal.
Le mineur de charbon a passé de longues heures sous terre à extraire du charbon.
C2 verb /ˈbɒtənaɪz/

botanize

étudier les plantes
Meaning
to study plants in their natural environment
Example
They went to the forest to botanize during their vacation.
Ils sont allés dans la forêt pour étudier les plantes pendant leurs vacances.
C2 noun /dæmˈneɪ.ʃən/

Damnation

damnation éternelle; destruction
Meaning
condemnation to eternal punishment in hell; something that causes ruin or failure
Example
The preacher spoke about salvation and damnation in his sermon.
Le prédicateur a parlé du salut et de la damnation dans son sermon.
C2 verb /pərˈlɔɪn/

purloin

voler
Meaning
to steal something, often in a sneaky or dishonest way
Example
He tried to purloin a book from the library without being noticed.
Il a essayé de voler un livre à la bibliothèque sans être remarqué.
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.
C2 adjective /ˈbrækɪʃ/

brackish

salé
Meaning
Slightly salty, often describing water that is a mix of fresh and seawater.
Example
The river estuary contained brackish water.
L'estuaire du fleuve contenait de l'eau salée.
C2 noun /ˈdɪfθɒŋ/

diphthong

diphtongue
Meaning
A complex vowel sound that begins with one vowel and glides into another within the same syllable.
Example
The word 'coin' contains a diphthong.
Le mot 'coin' contient un diphtongue.
C2 noun /ˌkəʊ.əˈles.əns/

coalescence

coalescence, fusion
Meaning
The process of coming together to form one mass or whole.
Example
The coalescence of different cultures creates diversity.
La coalescence de différentes cultures crée de la diversité.
C2 noun /ˈpjuːdʒɪlɪst/

pugilist

boxeur
Meaning
A professional or skilled boxer.
Example
The pugilist entered the ring with confidence.
Le boxeur est entré dans le ring avec confiance.
C2 adjective /tʃeɪst/

Chaste

chaste; vertueux
Meaning
pure and morally good; abstaining from sexual activity
Example
She lived a chaste and virtuous life.
Elle a vécu une vie chaste et vertueuse.
C2 noun /kəmˈpɒz.ɪ.tər/

Compositor

compositeur
Meaning
a person who arranges type for printing or creates musical compositions
Example
The compositor carefully arranged the text for the newspaper.
Le compositeur a soigneusement organisé le texte pour le journal.
C2 noun /pɛnˈtæmɪtər/

pentameter

pentamètre
Meaning
A line of verse consisting of five metrical feet.
Example
Shakespeare often wrote his plays in iambic pentameter.
Shakespeare écrivait souvent ses pièces en pentamètre iambique.
C2 verb /ˈtæri/

tarry

tarder
Meaning
To delay or linger; to stay longer than intended.
Example
Do not tarry, or you will miss the train.
Ne tardez pas, sinon vous manquerez le train.
C2 verb /ˈæbrəɡeɪt/

abrogate

abroger
Meaning
To formally repeal, cancel, or abolish a law, agreement, or custom.
Example
The government decided to abrogate the outdated treaty.
Le gouvernement a décidé d'abroger le traité obsolète.
C2 noun (plural) /ˈlɪniəmənts/

lineaments

traits du visage
Meaning
The features or distinctive characteristics of the face or body.
Example
The lineaments of his face were sharp and stern.
Les traits de son visage étaient aigus et sévères.
C2 noun /ˈbriːtʃɪz/

Breeckes

pantalons jusqu'aux genoux
Meaning
knee-length trousers; short pants
Example
He wore riding breeches for the equestrian event.
Il portait des pantalons jusqu'aux genoux pour l'événement équestre.
C2 noun /ˈsɒfɪstri/

sophistry

sophistique
Meaning
the use of clever but false arguments, often to deceive
Example
The politician's speech was full of sophistry.
Le discours du politicien était plein de sophistique.
C2 verb /fleɪl/

flail

agiter ou balancer quelque chose sauvagement; se débattre
Meaning
to wave or swing something about wildly; to thrash about
Example
He flailed his arms to keep afloat in the water.
Il agitait ses bras pour rester à flot dans l'eau.
C2 noun /ˈræbəl/

Rabble

foule
Meaning
a disorderly crowd; the common people regarded as socially inferior
Example
The politician dismissed the protesters as mere rabble.
Le politicien a rejeté les manifestants comme une simple foule.
C2 adjective ˈɛr.jʊ.daɪt

erudite

érudit ou savant
Meaning
Having or showing great knowledge or learning; scholarly and intellectual.
Example
The professor's erudite lecture fascinated the students.
Le discours érudit du professeur a fasciné les étudiants.
C2 noun /ˌsuːdəˈnɪmɪti/

pseudonymity

utilisation de pseudonyme
Meaning
the practice or state of using a pseudonym
Example
The author maintained pseudonymity throughout her career.
L'auteure a maintenu l'utilisation de pseudonyme tout au long de sa carrière.
C2 verb /ˌmɪskənˈsiːv/

misconceive

mal comprendre
Meaning
To misunderstand or form an incorrect idea about something.
Example
He misconceived the purpose of the project.
Il a mal compris l'objectif du projet.
C2 noun /ˈsætræp/

satrap

satrape
Meaning
a governor of a province in ancient Persia; also used figuratively for a subordinate ruler
Example
The king appointed a satrap to oversee the distant province.
Le roi nomma un satrape pour superviser la province éloignée.
C2 noun /ˈhæk.ni ˈkær.ɪdʒ/

Hackney carriage

voiture de location
Meaning
A taxi; a car licensed to carry passengers for hire
Example
I called a hackney carriage to get to the airport.
J'ai appelé une voiture de location pour aller à l'aéroport.
C2 noun /ˈdoʊtɪdʒ/

dotage

vieillesse
Meaning
The period of old age, especially when one is weak or senile.
Example
He spent his dotage reminiscing about his youth.
Il a passé sa vieillesse à se remémorer sa jeunesse.
C2 noun /ˈhænd ˌrɪŋɪŋ/

hand-wringing

inquiétude excessive
Meaning
excessive worry or concern expressed in a visible or dramatic way.
Example
There was much hand-wringing over the political crisis.
Il y avait beaucoup de gestes dramatiques à propos de la crise politique.
C2 adjective /ˈmɜːrkəntaɪl/

mercantile

commercial
Meaning
related to trade or commerce
Example
The city grew rapidly due to its mercantile activities.
La ville a rapidement prospéré grâce à ses activités mercantiles.
C2 noun /ˈbɑːr.nɪ.kəl/

Barnacle

balane
Meaning
a marine crustacean that attaches itself permanently to underwater surfaces
Example
The old ship's hull was covered with barnacles.
La coque du vieux navire était couverte de balanes.
C2 verb /əˈkuːtə/

accoutre

accoutrer
Meaning
to dress or equip, especially in something impressive or elaborate
Example
The knight was accoutred in shining armor.
Le chevalier était accoutré en armure brillante.
C2 noun /wɪt/

whit

une très petite quantité
Meaning
a very small part or amount
Example
He doesn't care a whit about the outcome.
Il ne se soucie pas d'un iota du résultat.
C2 noun /ˌnjʊə.rəʊˈdʒɛn.ɪ.sɪs/

neurogenesis

formation de nouvelles cellules nerveuses
Meaning
The process of forming new nerve cells in the brain.
Example
Scientists are studying neurogenesis to understand brain health.
Les scientifiques étudient la neurogénèse pour comprendre la santé du cerveau.
C2 noun /mæŋˈɡoʊ.li.ə/

Mangolia

magnolia
Meaning
a type of flowering tree with large, fragrant pink or white flowers
Example
The beautiful magnolia tree bloomed in spring with pink flowers.
Le magnifique arbre de magnolia a fleuri au printemps avec des fleurs roses.
C2 noun /ˌɪdiəˈsɪŋkrəsi/

idiosyncrasy

idiosyncrasie
Meaning
A distinctive or peculiar characteristic, habit, or mannerism unique to an individual.
Example
One of her idiosyncrasies was humming while working.
L'une de ses idiosyncrasies était de fredonner en travaillant.
C2 noun /ˈlɪmərɪk/

limerick

un poème humoristique en cinq vers
Meaning
a humorous five-line poem with a specific rhythm and rhyme scheme (AABBA).
Example
She recited a funny limerick at the party.
Elle a récité un limerick amusant à la fête.
C2 noun /ˈlæsɪtjuːd/

lassitude

lassitude
Meaning
a state of physical or mental weariness; lack of energy
Example
After the long hike, a feeling of lassitude swept over the group.
Après la longue randonnée, un sentiment de lassitude a envahi le groupe.
C2 noun /ˌbrɪɡ.əˈdɪər/

brigadier

brigadier
Meaning
A military officer rank, usually commanding a brigade.
Example
The brigadier inspected the troops before the parade.
Le brigadier a inspecté les troupes avant le défilé.
C2 adjective /ʌnˈsʌlid/

unsullied

immaculé
Meaning
not spoiled or made impure; perfectly clean or pure
Example
His reputation remained unsullied despite the accusations.
Sa réputation est restée immaculée malgré les accusations.
C2 noun /ˈkætɪtʃuː/

Catechu

catechu
Meaning
an extract from a tropical Asian plant, used in tanning and dyeing
Example
Catechu extract is commonly used in traditional medicine.
L'extrait de catechu est couramment utilisé dans la médecine traditionnelle.
C2 adjective /ɔːˈrɪfərəs/

auriferous

aurifère
Meaning
Containing or producing gold.
Example
The miners discovered an auriferous vein in the mountains.
Les mineurs ont découvert un filon aurifère dans les montagnes.
C2 adjective /ˌnɒndɪˈskrɪpt/

nondescript

banal
Meaning
Lacking distinctive or interesting features; dull and unremarkable.
Example
He lives in a nondescript apartment building on the edge of town.
Il vit dans un immeuble d'appartements banal à la périphérie de la ville.
C2 verb /θrɛʃ/

thresh

battre
Meaning
to separate grain from the plant by beating or by using a machine
Example
Farmers used machines to thresh the wheat after harvest.
Les agriculteurs ont utilisé des machines pour battre le blé après la récolte.
C2 noun /ɡruːəl/

Gruel

bouillie
Meaning
a thin liquid food of oatmeal or another meal boiled in milk or water
Example
The sick patient could only eat gruel.
Le patient malade n'a pu manger que de la bouillie.
C2 verb /koʊˈhɪr/

cohere

cohérer
Meaning
To stick together; to be united logically or physically.
Example
The ideas in his essay cohere well.
Les idées de son essai cohèrent bien.
C2 noun /ˈlɪθəˌɡræf/

lithograph

lithographie (impression sur pierre)
Meaning
a print made by lithography, often artistic
Example
The museum displayed a rare lithograph from the 19th century.
Le musée a exposé une lithographie rare du 19e siècle.
C2 verb /ɪˈnæmər/

enamor

être amoureux
Meaning
to be filled with love or admiration for
Example
She was enamored with the beautiful scenery.
Elle était énamourée du beau paysage.
C2 noun /ˈhaɪərəˌɡlɪf/

hieroglyph

hiéroglyphe
Meaning
A picture or symbol used in ancient writing systems, especially Egyptian writing.
Example
The walls of the temple were covered in hieroglyphs.
Les murs du temple étaient recouverts de hiéroglyphes.
C2 adjective /ˈruːmi/

rheumy

larmoyant
Meaning
Watery, especially referring to the eyes.
Example
His rheumy eyes showed signs of age and fatigue.
Ses yeux larmoyants montraient des signes de vieillesse et de fatigue.
C2 adverb, adjective /ˈɡrætɪs/ or /ˈɡreɪtɪs/

gratis

gratuit
Meaning
Without charge; free of cost.
Example
The drinks at the event were provided gratis.
Les boissons à l'événement étaient fournies gratuitement.
C2 noun /ˈsɛpəlˌtʃər/

Sepulture

tombeau; sépulture;
Meaning
the act of burying a dead body; burial; a grave or tomb
Example
The ancient king's sepulture was discovered by archaeologists.
Le sépulcre du roi ancien a été découvert par les archéologues.
C2 verb /əbˈhɔːr/

abhor

abhorrer
Meaning
to regard with disgust and hatred
Example
She abhors cruelty to animals.
Elle abhorre la cruauté envers les animaux.
C2 noun /ˈwɪtɪˌsɪzəm/

witticism

réplique spirituelle / plaisanterie
Meaning
a clever or funny remark
Example
Her witticism made everyone laugh during the meeting.
Sa réplique spirituelle a fait rire tout le monde pendant la réunion.
C2 adjective /ˈpjʊəraɪl/

puerile

infantile
Meaning
childishly silly or immature
Example
His puerile jokes annoyed the audience.
Ses blagues infantiles ont agacé le public.
C2 verb /ˌriː.kəˈpɪtʃ.ə.leɪt/

recapitulate

récapituler
Meaning
To summarize and state again the main points of something.
Example
The teacher asked the student to recapitulate the lesson.
Le professeur a demandé à l'étudiant de récapituler la leçon.
C2 noun /ˈstiː.vəˌdɔːr/

stevedore

dockeur
Meaning
A person employed to load and unload cargo from ships.
Example
The stevedores worked tirelessly to unload the cargo before dawn.
Les dockeurs ont travaillé sans relâche pour décharger la cargaison avant l'aube.
C2 noun /ˈsɪlədʒɪzəm/

syllogism

syllelogisme
Meaning
A form of reasoning in which a conclusion is drawn from two given or assumed premises.
Example
The philosopher explained the concept of syllogism using simple examples.
Le philosophe a expliqué le concept du syllogisme en utilisant des exemples simples.
C2 noun /ˈbækənæl/

bacchanal

fête sauvage
Meaning
A noisy party involving drinking and revelry.
Example
The festival turned into a wild bacchanal by midnight.
Le festival s'est transformé en une fête sauvage à minuit.
C2 verb /ˈfɜːrbɪʃ/

furbish

lustrer
Meaning
to polish, renovate, or give a fresh look to something
Example
The workers furbished the old sword until it gleamed like new.
Les travailleurs ont lustré l'épée ancienne jusqu'à ce qu'elle brille comme neuve.
C2 adjective /ˈsɪbɪlənt/

sibilant

avec un son sifflant
Meaning
Making or characterized by a hissing sound.
Example
The word 'snake' starts with a sibilant sound.
Le mot 'snake' commence par un son sifflant.
C2 adjective /ˈnɒmɪk/

nomic

relatif à la loi
Meaning
Relating to laws, rules, or systems.
Example
The philosopher discussed the nomic necessity of natural laws.
Le philosophe a discuté de la nécessité nomique des lois naturelles.
C2 noun /ˈveɪnɡlɔːri/

vainglory

vanité
Meaning
Excessive vanity or boastfulness about one's achievements.
Example
His speech was filled with vainglory and self-praise.
Son discours était rempli de vanité et d'autopromotion.
C2 noun /ˈlaɪtoʊtiːz/

litotes

litote
Meaning
a figure of speech in which an affirmative is expressed by the negative of its contrary
Example
Saying 'not bad' as a compliment is an example of litotes.
Dire 'pas mal' comme compliment est un exemple de litote.
C2 noun /ˈɒb.stɪ.nə.si/

obstinacy

obstination
Meaning
Stubborn refusal to change one's opinion or chosen course of action, despite attempts to persuade one to do so.
Example
His obstinacy made negotiations difficult.
Son obstination a rendu les négociations difficiles.
C2 verb /ˈbɪloʊ/

billow

se gonfler comme des vagues
Meaning
To swell or rise in large waves or surges; to flow outward in a rolling motion.
Example
Smoke billowed from the burning building.
La fumée se gonflait comme des vagues depuis le bâtiment en feu.
C2 adjective /səˈɡeɪ.ʃəs/

sagacious

sage
Meaning
Having or showing keen mental discernment and good judgment; wise.
Example
His sagacious leadership saved the company from failure.
Sa direction sage a sauvé l'entreprise de l'échec.
C2 noun /ˈɑːr.bɪ.trɑːʒ/

arbitrage

arbitrage
Meaning
The simultaneous buying and selling of securities in different markets to take advantage of differing prices.
Example
Investors use arbitrage to make profits in global markets.
Les investisseurs utilisent l'arbitrage pour réaliser des bénéfices sur les marchés mondiaux.
C2 noun /ˈfiːæt/

fiat

décret, mandat
Meaning
an official order or decree; authoritative command
Example
The new policy was enacted by royal fiat.
La nouvelle politique a été mise en œuvre par un décret royal.
C2 adjective /ˈbuːtləs/

bootless

inutile
Meaning
Useless or futile; of no benefit.
Example
His bootless attempt to fix the machine only wasted time.
Sa tentative inutile de réparer la machine n'a fait que perdre du temps.
C2 noun /ˈæp.ɪˌkʌl.tʃər/

apiculture

apiculture
Meaning
The practice of keeping and raising bees for honey and other products.
Example
Apiculture plays a vital role in agriculture by supporting pollination.
L'apiculture joue un rôle vital dans l'agriculture en soutenant la pollinisation.
C2 adjective /ˌɪrɛvəˈrɛnʃəl/

irreverential

irrévérencieux
Meaning
Showing a lack of respect for things that are generally taken seriously.
Example
His irreverential humor often shocked traditional audiences.
Son humour irrévérencieux choquait souvent les spectateurs traditionnels.
C2 adjective /vɛˈstɪdʒiəl/

vestigial

vestigial
Meaning
Relating to a small, undeveloped remnant of something that was once much larger or more functional.
Example
Humans have a vestigial tailbone that no longer serves its original purpose.
Les humains ont un os du coccyx vestigial qui ne remplit plus sa fonction d'origine.
C2 noun /trænsˈluːsəns/

translucence

semi-transparence
Meaning
the quality of allowing light to pass through but not detailed shapes
Example
The translucence of the curtains filled the room with soft light.
La semi-transparence des rideaux remplissait la pièce de lumière douce.
C2 adjective /rəˈkoʊkoʊ/

rococo

rococo
Meaning
characterized by ornate detail and elaborate decoration, especially in art, architecture, and design
Example
The palace was decorated in a lavish rococo style.
Le palais a été décoré dans un style rococo luxueux.
C2 adjective /ɪˈnɪm.ɪ.tə.bəl/

inimitable

inimitable
Meaning
So good or unusual as to be impossible to copy; unique.
Example
His inimitable writing style made him a literary legend.
Son style d'écriture inimitable a fait de lui une légende littéraire.
C2 noun /ˌoʊpəˈlɛsəns/

opalescence

opalescence
Meaning
a milky or pearly appearance of a surface like that of an opal
Example
The pearl had a gentle opalescence under the light.
La perle avait une douce opalescence sous la lumière.
C2 adjective /ˈəʊ.dər.əs/

Odorous

parfumé; aromatique
Meaning
having a strong smell; fragrant; aromatic
Example
The garden was filled with odorous flowers.
Le jardin était rempli de fleurs parfumées.
C2 noun /ˈmʌrɪn/

murrain

maladie infectieuse du bétail
Meaning
An infectious disease that affects cattle and other animals, often fatal.
Example
The farmer lost many cows during the outbreak of murrain.
Le fermier a perdu de nombreuses vaches lors de l'épidémie de murrain.
C2 adjective /ˌɛkjʊˈmɛnɪkəl/

ecumenical

unité religieuse œcuménique
Meaning
Promoting unity among different Christian churches or religions.
Example
The leaders gathered for an ecumenical conference to encourage dialogue.
Les dirigeants se sont réunis pour une conférence œcuménique afin de favoriser le dialogue.
C2 noun /ˈsɪniæst/

cineast

cinéaste
Meaning
A film enthusiast or filmmaker; a person deeply interested in cinema.
Example
As a true cineast, she spends most weekends watching classic films.
En tant que véritable cinéaste, elle passe la plupart de ses week-ends à regarder des films classiques.
C2 noun /ˈkɔːldrən/

caldron

grand chaudron en métal
Meaning
A large metal pot used for boiling liquids or cooking over an open fire.
Example
The witch stirred her potion in a bubbling caldron.
La sorcière remuait sa potion dans un chaudron bouillonnant.
C2 adjective /ɪˈmɒdərət/

immoderate

immodéré
Meaning
excessive; beyond reasonable limits
Example
He has an immoderate love for sweets.
Il a un amour immodéré pour les bonbons.
C2 adjective /ɪˈnɪkwɪtəs/

iniquitous

iniquité
Meaning
grossly unfair and morally wrong
Example
Slavery was one of the most iniquitous practices in history.
L'esclavage était l'une des pratiques les plus iniquitous de l'histoire.
C2 adjective /ˈdɔːnt.ləs/

dauntless

intrépide, courageux, déterminé
Meaning
Showing fearlessness and determination; brave and resolute.
Example
The dauntless soldier fought against all odds.
Le soldat intrépide a combattu contre toutes les adversités.
C2 adjective /ɪˈfɛktʃuəl/

effectual

efficace
Meaning
producing a desired or intended effect, often used in formal contexts
Example
Her effectual efforts brought peace to the community.
Ses efforts efficaces ont apporté la paix à la communauté.
C2 adjective /ˈmɛtrɪkəl/

metrical

métrique
Meaning
Relating to or composed in a regular rhythmic pattern of beats or meter, especially in poetry.
Example
The poet carefully followed metrical rules in his verses.
Le poète a suivi soigneusement les règles métriques dans ses vers.
C2 noun /traɪst/

tryst

rendez-vous secret
Meaning
a private romantic meeting between lovers
Example
They arranged a secret tryst in the park.
Ils ont organisé un rendez-vous secret dans le parc.
C2 adjective /ˌɛvəˈnɛsənt/

evanescent

éphémère
Meaning
Quickly fading or disappearing; lasting for only a very short time.
Example
The beauty of the sunset was evanescent, fading within minutes.
La beauté du coucher du soleil était éphémère, disparaissant en quelques minutes.
C2 noun /ˌæntɪˈtɒksɪn/

antitoxin

antitoxine
Meaning
A substance that neutralizes a specific toxin in the body.
Example
The doctor administered an antitoxin to counter the snake venom.
Le médecin a administré une antitoxine pour contrer le venin de serpent.