ornithology
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C2 noun /ˌɔːrnɪˈθɑːlədʒi/

ornithology

ornitología
Meaning
the scientific study of birds
Example
She pursued ornithology to understand the migration patterns of birds.
Ella persiguió la ornitología para entender los patrones de migración de los pájaros.
C2 noun /liːdʒ/

liege

señor feudal
Meaning
A feudal lord entitled to allegiance and service; a loyal subject.
Example
The knight pledged loyalty to his liege.
El caballero juró lealtad a su señor feudal.
C2 noun /ɪnˈkɒnstənsi/

inconstancy

inconstancia
Meaning
The quality of changing frequently or being unreliable.
Example
The inconstancy of the weather makes planning difficult.
La inconstancia del clima hace que planificar sea difícil.
C2 verb /ˌkɒnvəˈlɛs/

convalesce

recuperarse, recuperar salud y fuerza después de una enfermedad o tratamiento médico
Meaning
to recover health and strength after illness or medical treatment
Example
After the surgery, she spent several weeks convalescing at home.
Después de la cirugía, pasó varias semanas convaleciendo en casa.
C2 noun /ˌɪn.ʌnˈdeɪ.ʃən/

inundation

inundación
Meaning
The act of flooding or overwhelming with water or things.
Example
The town suffered from a severe inundation after the heavy rains.
La ciudad sufrió una grave inundación después de las fuertes lluvias.
C2 noun /məˈdɒn.ə/

madonna

madonna (Virgen María)
Meaning
An artistic representation of the Virgin Mary; also used as a respectful form of address for a woman in Italian culture.
Example
The Renaissance painting depicts a Madonna holding child Jesus.
La pintura renacentista muestra a una Madonna sosteniendo al niño Jesús.
C2 noun /dɪsˈkwaɪɪtjuːd/

disquietude

inquietud
Meaning
A state of uneasiness, anxiety, or restlessness.
Example
His constant pacing showed his inner disquietude.
Su constante caminar mostró su inquietud interior.
C2 noun /ˈtɜːrməɡənt/

termagant

mujer dominante y temperamental
Meaning
A harsh-tempered or overbearing woman.
Example
The character was portrayed as a loud and domineering termagant.
El personaje fue retratado como una mujer ruidosa y dominante.
C2 noun /priˈɛmpʃən/

preemption

derecho de preferencia
Meaning
The act of taking action before someone else; the right to purchase or act before others.
Example
The company exercised preemption to acquire the land before competitors.
La empresa ejerció el derecho de preferencia para adquirir la tierra antes que los competidores.
C2 adjective fəˈleɪ.ʃəs

fallacious

falso
Meaning
Based on false reasoning or misleading arguments.
Example
His argument was based on fallacious reasoning.
Su argumento estaba basado en razonamientos falsos.
C2 noun /daɪn/

dyne

unidad de fuerza (sistema cgs)
Meaning
A unit of force in the centimeter-gram-second (cgs) system equal to 10⁻⁵ newtons.
Example
The physicist measured the force in dynes.
El físico midió la fuerza en dynes.
C2 noun /ˈsʊrmə fɪʃ/

Surma fish

pez Surma
Meaning
a freshwater fish species found in the Surma river system of Bangladesh and northeastern India
Example
Surma fish is native to the rivers of Sylhet region.
El pez Surma es originario de los ríos de la región de Sylhet.
C2 verb /blæsˈfiːm/

blaspheme

blasfemar
Meaning
to speak irreverently about God or sacred things
Example
He was accused of blaspheming during the heated argument.
Fue acusado de blasfemar durante la discusión acalorada.
C2 adjective /ˈɛdɪfaɪɪŋ/

edifying

edificante
Meaning
Providing moral or intellectual instruction or enlightenment.
Example
The documentary was both entertaining and edifying.
El documental fue tanto entretenido como edificante.
C2 noun /ˈblændɪʃmənt/

blandishment

adulación
Meaning
flattering or pleasing statement or action used to persuade someone gently
Example
She used every blandishment to win his support.
Usó todas las adulaciónes para ganar su apoyo.
C2 verb /ˈæbrəɡeɪt/

abrogate

abrogar
Meaning
To formally repeal, cancel, or abolish a law, agreement, or custom.
Example
The government decided to abrogate the outdated treaty.
El gobierno decidió abrogar el tratado obsoleto.
C2 adjective /lɪˈbɪdənəs/

libidinous

lascivo
Meaning
Showing excessive sexual drive; lustful.
Example
The play was criticized for its libidinous characters.
La obra fue criticada por sus personajes lascivos.
C2 adjective /ˈflæs.ɪd/

Flaccid

flácido; flojo; colapsado;
Meaning
soft and limp; lacking firmness; drooping
Example
The plant's leaves became flaccid after days without water.
Las hojas de la planta se volvieron flácidas después de varios días sin agua.
C2 verb /bɪˈleɪ/

belay

asegurar una cuerda
Meaning
to secure a rope by winding it around an object; to stop or cancel an order (nautical/military use)
Example
The climber asked his partner to belay the rope tightly.
El escalador le pidió a su compañero que asegurara la cuerda fuertemente.
C2 noun /ˈlɪθəˌɡræf/

lithograph

litografía (impresión de piedra)
Meaning
a print made by lithography, often artistic
Example
The museum displayed a rare lithograph from the 19th century.
El museo exhibió una rara litografía del siglo XIX.
C2 adjective /ˌbiːəˈtɪfɪk/

beatific

beatífico
Meaning
blissfully happy or showing great joy
Example
She had a beatific smile after hearing the good news.
Ella tenía una sonrisa beatífica después de escuchar las buenas noticias.
C2 verb /ˈhɑːrpɪŋ/

harping

quejarse constantemente
Meaning
continuously talking or complaining about something in a tiresome way
Example
She kept harping on about the mistakes I made.
Ella siguió quejándose constantemente sobre los errores que cometí.
C2 verb /ˌækwiˈɛs/

acquiesce

aceptar sin protestar
Meaning
to accept something reluctantly but without protest
Example
She decided to acquiesce to her parents’ wishes.
Ella decidió aceptar sin protestar los deseos de sus padres.
C2 noun /ˌkæl.sɪ.fɪˈkeɪ.ʃən/

calcification

calcificación
Meaning
The process of calcium accumulation in soil, making it hard.
Example
Calcification reduces soil permeability and affects crop growth.
La calcificación reduce la permeabilidad del suelo y afecta el crecimiento de los cultivos.
C2 verb /ˌkaʊntərˈmænd/

countermand

revocar una orden
Meaning
to revoke or cancel an order or command
Example
The general countermanded the previous orders immediately.
El general revocó las órdenes anteriores inmediatamente.
C2 adjective /ˈɑːsɪˌfaɪd/

ossified

convertido en hueso, rígido
Meaning
Turned into bone or become rigid; unwilling to change.
Example
The company had an ossified management structure that resisted innovation.
La empresa tenía una estructura de gestión rígida que resistía la innovación.
C2 noun /ˈkɔːrpəskəl/

corpuscle

partícula pequeña o célula, especialmente célula sanguínea
Meaning
a small particle or cell, especially a blood cell
Example
Red corpuscles carry oxygen throughout the body.
Los glóbulos rojos llevan oxígeno a través del cuerpo.
C2 verb /ˌʌndərˈɡɜːrd/

undergird

sustentar, reforzar
Meaning
to provide support or foundation for; to strengthen
Example
Strong values undergird a healthy society.
Los valores fuertes sustentan una sociedad saludable.
C2 noun /ˈfɔːrˌseɪl/

foresail

vela de proa
Meaning
The principal sail set on the foremast of a sailing vessel.
Example
The crew adjusted the foresail to catch the wind.
La tripulación ajustó la vela de proa para capturar el viento.
C2 adjective /ˈærənt/

arrant

completo, absoluto
Meaning
complete or utter (used negatively, e.g., 'arrant nonsense')
Example
His excuse was arrant nonsense.
Su excusa fue una tontería absoluta.
C2 adjective /ˌɪndɪˈsɒljʊbl/

indissoluble

Indisoluble
Meaning
Unable to be destroyed, broken, or dissolved.
Example
Marriage was once considered an indissoluble bond.
El matrimonio alguna vez fue considerado un vínculo indisoluble.
C2 noun brəˈvɑː.dəʊ

bravado

gesto de valentía o confianza que no es real
Meaning
Show of courage or confidence that is not real.
Example
His bravado masked his nervousness before the performance.
Su bravado ocultó su nerviosismo antes de la actuación.
C2 noun /prɪˈhɛnʃən/

prehension

acción de agarrar; la capacidad de sujetar algo
Meaning
the act of grasping or seizing; the ability to take hold of something
Example
Therapists assessed the patient's prehension during hand therapy.
Los terapeutas evaluaron la prehensión del paciente durante la terapia de manos.
C2 noun /pəˈruːzl/

perusal

lectura cuidadosa
Meaning
The action of reading or examining something carefully.
Example
The contract was given to the lawyer for perusal.
El contrato fue dado al abogado para su lectura cuidadosa.
C2 verb /kəˈlʌmnieɪt/

calumniate

calumniar
Meaning
To make false and damaging statements about someone; to slander.
Example
He was furious when he realized they had calumniated his reputation.
Él estaba furioso cuando se dio cuenta de que habían calumniado su reputación.
C2 noun /skɪf/

skiff

bote pequeño
Meaning
a small, light boat usually for one person
Example
The fisherman paddled his skiff across the lake.
El pescador remó su bote pequeño a través del lago.
C2 adjective /kɒnˈsæŋɡwɪn/

consanguine

consanguíneo
Meaning
Of the same blood or origin; related by birth.
Example
The two families were consanguine through their grandparents.
Las dos familias eran consanguíneas a través de sus abuelos.
C2 adjective /ɪnˈkoʊ.ɪt/ or /ɪnˈkoʊ.eɪt/

inchoate

incompleto
Meaning
Just begun and not fully formed; rudimentary.
Example
His inchoate ideas needed more research to be developed.
Sus ideas incompletas necesitaban más investigación para ser desarrolladas.
C2 noun /ˈsʌfərəns/

sufferance

tolerancia
Meaning
patient endurance of pain, hardship, or delay; passive consent or tolerance
Example
He lived in poverty with quiet sufferance.
Vivió en la pobreza con tolerancia silenciosa.
C2 noun /ˈɡrɑːtoʊ/

grotto

gruta
Meaning
a small picturesque cave, often artificial
Example
Tourists visited the grotto hidden behind the waterfall.
Los turistas visitaron la gruta oculta detrás de la cascada.
C2 adjective /ˈfækʃəs/

factious

faccionado
Meaning
causing disagreement or division within a group; inclined to form factions
Example
The debate became factious, splitting the committee into rival camps.
El debate se volvió faccioso, dividiendo al comité en campos rivales.
C2 noun /θroʊz/

throes

dolor intenso
Meaning
intense or violent pain and struggle, often at the beginning or end of something
Example
The country was in the throes of a political crisis.
El país estaba en el dolor intenso de una crisis política.
C2 adjective /ˈhaɪˌbraʊ/

highbrow

intelectualmente superior
Meaning
intellectually superior or cultured; often describing art, literature, or activities appealing to intellectual tastes
Example
The museum is known for its highbrow exhibitions.
El museo es conocido por sus exposiciones de alto nivel.
C2 noun /vɛkˈseɪʃən/

vexation

exasperación
Meaning
the state of being annoyed, frustrated, or worried
Example
She could not hide her vexation after the repeated delays.
Ella no pudo esconder su exasperación después de los repetidos retrasos.
C2 noun /ˈdʒʌŋk.tʃər/

jucture

momento crítico
Meaning
a particular point in time, especially one of great importance or crisis
Example
At this critical jucture, the company must decide whether to expand or downsize.
En este momento crítico, la empresa debe decidir si expandirse o reducirse.
C2 noun /ˈmɪlɪt/

millet

mijo
Meaning
a small-seeded grass cultivated as a cereal crop
Example
Millet is often used as food in rural areas.
El mijo se usa a menudo como alimento en las áreas rurales.
C2 adverb /əˈbæk/

Aback

sorprendido
Meaning
by surprise; unexpectedly
Example
I was taken aback by his sudden announcement.
Me sorprendió su anuncio repentino.
C2 noun /ˈdaɪɡræf/

digraph

digrama
Meaning
A pair of letters representing a single sound, such as 'sh' in 'ship'.
Example
In the word 'phone', the letters 'ph' form a digraph.
En la palabra 'teléfono', las letras 'ph' forman un digrama.
C2 noun /ˈprɒvəndər/

provender

alimento para el ganado
Meaning
food or provisions, especially for livestock
Example
The barn was filled with provender for the cattle.
El granero estaba lleno de alimento para el ganado.
C2 noun /njuːˈmɪzmətɪst/

numismatist

numismático
Meaning
A person who studies or collects coins, paper currency, and medals.
Example
The numismatist displayed his rare coin collection at the exhibition.
El numismático exhibió su rara colección de monedas en la exposición
C2 adjective /həˈrɛtɪkəl/

heretical

herético
Meaning
Relating to or characterized by departure from accepted beliefs or standards, especially in religion.
Example
The priest condemned the book as heretical.
El sacerdote condenó el libro como herético.
C2 noun /ɪˈlɛk.trə.taɪp/

electrotype

electrotipo
Meaning
A duplicate printing plate made by electroplating a mold of the original.
Example
The printer used an electrotype to produce multiple copies of the page.
El impresor utilizó un electrotipo para producir múltiples copias de la página.
C2 adjective /ˈvoʊlənt/

volant

volador
Meaning
able to fly or moving swiftly
Example
The volant bird soared gracefully across the sky.
El pájaro volador se elevó con gracia por el cielo.
C2 adjective /ˈpʌkɪʃ/

puckish

travieso
Meaning
playfully mischievous
Example
The child gave a puckish grin before hiding the toy.
El niño dio una sonrisa traviesa antes de esconder el juguete.
C2 adjective /ˈnɛtlˌsʌm/

nettlesome

irritante
Meaning
Causing irritation, annoyance, or difficulty.
Example
The nettlesome rules frustrated the workers.
Las reglas irritantes frustraron a los trabajadores.
C2 noun /ˈdɒɡ roʊz/

Dog-rose

rosa canina
Meaning
A wild rose species with pink or white flowers and thorny stems, common in hedgerows
Example
The dog-rose bush grew wild along the countryside path.
El arbusto de rosa canina creció salvajemente a lo largo del sendero del campo.
C2 adjective /ˌɪnæprɪˈhɛnsəbl/

inapprehensible

incomprensible
Meaning
not understandable; incomprehensible
Example
The concept was so abstract that it seemed inapprehensible to most students.
El concepto era tan abstracto que parecía incomprensible para la mayoría de los estudiantes.
C2 noun /ˈpeɪpəsi/

papacy

papado
Meaning
The office or authority of the Pope in the Roman Catholic Church.
Example
The papacy played a significant role in medieval European politics.
El papado jugó un papel importante en la política medieval europea.
C2 noun /ˌpɛkjʊˈleɪʃən/

peculation

malversación
Meaning
The act of embezzling or stealing money, especially from public funds.
Example
The minister resigned after being accused of peculation.
El ministro renunció después de ser acusado de malversación.
C2 adjective /dɪˈluːsəri/

delusory

ilusorio
Meaning
Based on illusion; not real.
Example
He was filled with delusory hopes of becoming famous overnight.
Estaba lleno de falsas esperanzas de hacerse famoso de la noche a la mañana.
C2 verb /əˈbʌt/

abut

colindar
Meaning
to be next to or share a border with
Example
The park abuts the river on the north side.
El parque colinda con el río en el lado norte.
C2 noun /ˈmæləprɒˌpɪzəm/

malapropism

malapropismo
Meaning
the mistaken use of a word in place of a similar-sounding one, often with amusing effect
Example
He is famous for his malapropism when speaking in public.
Es famoso por su malapropismo cuando habla en público.
C2 phrase ˌdʒʊə.rɪs.pruːˈden.ʃəl ˈbentʃ.mɑːk

jurisprudential benchmark

punto de referencia jurídico
Meaning
A legal standard or precedent that serves as a reference point for future legal decisions.
Example
The decision set a jurisprudential benchmark.
La decisión estableció un punto de referencia jurídico.
C2 noun /ˌdʒerənˈtɑːkrəsi/

gerontocracy

gerontocracia
Meaning
A system of government or control by old people.
Example
The country was seen as a gerontocracy, dominated by elderly leaders.
El país era visto como una gerontocracia, dominada por líderes ancianos.
C2 noun ˈɛn.ɡræm

Engram

Señales físicas en el cerebro para el almacenamiento y recuperación de recuerdos
Meaning
Physical signs or patterns in the brain for memory storage and retrieval
Example
Scientists study engrams to understand how memories are stored.
Los científicos estudian los engramas para comprender cómo se almacenan los recuerdos.
C2 noun /ˌfɔːrɔːrdɪˈneɪʃən/

foreordination

preordenación
Meaning
the act of determining something in advance; predestination
Example
The doctrine of foreordination suggests that events are fixed by divine will.
La doctrina de la preordenación sugiere que los eventos están fijados por la voluntad divina.
C2 noun /ˌɪn.strəˈmɛn.təl.ɪst/

instrumentalist

instrumentista
Meaning
A person who plays a musical instrument.
Example
The instrumentalist played a beautiful solo on the violin.
El instrumentista tocó un hermoso solo en el violín.
C2 verb /flɪt/

flit

revolotear
Meaning
to move quickly and lightly from one place to another
Example
Butterflies flitted from flower to flower.
Las mariposas revoloteaban de flor en flor.
C2 verb /ˌdɒmɪˈnɪə/

domineer

dominar
Meaning
to assert one's will over another in an arrogant way
Example
He tends to domineer over his younger colleagues.
Él tiende a dominar a sus colegas más jóvenes.
C2 noun /miːn/

mien

aspecto
Meaning
A person's appearance or manner, especially as an indication of their character or mood.
Example
His serious mien made everyone fall silent.
Su aspecto serio hizo que todos se quedaran en silencio.
C2 adjective ˌɪm.pəˈtɜː.bə.bəl

imperturbable

imperturbable
Meaning
Unable to be upset or excited; not easily disturbed.
Example
His imperturbable nature made him a great leader.
Su naturaleza imperturbable lo convirtió en un gran líder.
C2 noun /əˈprəʊ.bri.əm/

opprobrium

desprecio, oprobio
Meaning
Harsh criticism or public disgrace.
Example
The scandal brought opprobrium on the politician.
El escándalo trajo desprecio al político.
C2 adjective /ˈtjuːtɪlɑːr/

tutelar

tutelario
Meaning
Serving as a guardian or protector.
Example
The tutelar spirit of the forest was believed to protect travelers.
Se creía que el espíritu tutelar del bosque protegía a los viajeros.
C2 adjective /eɪˈsɛfələs/

acephalous

acéfalo
Meaning
having no leader or head; headless
Example
The acephalous group soon fell into disorganization.
El grupo acéfalo pronto cayó en desorganización.
C2 noun /ˈtrʌk.jʊ.ləns/

truculence

agresividad
Meaning
Aggressiveness or eagerness to fight.
Example
His speech was full of truculence and threats.
Su discurso estaba lleno de agresividad y amenazas.
C2 noun /fəˈlɪsɪti/

felicity

felicidad
Meaning
intense happiness; the ability to find appropriate expression for one's thoughts
Example
She was known for her felicity in conversation and cheerful nature.
Era conocida por su felicidad en las conversaciones y su naturaleza alegre.
C2 adjective /ˈsɪlieɪtɪd/

ciliated

con cilios
Meaning
Having minute hairlike projections (cilia) on the surface of cells or organisms.
Example
The ciliated cells in the respiratory tract help move mucus out of the lungs.
Las células ciliadas en el tracto respiratorio ayudan a mover el moco fuera de los pulmones.
C2 noun /kəˈræf/

carafe

botijo de vidrio
Meaning
a glass container without handles used for serving drinks like water or wine
Example
The waiter brought a carafe of water to the table.
El camarero trajo un botijo de agua a la mesa.
C2 noun /ˈreɪdɪks/

radix

base
Meaning
the base or root of something; the number on which a system of numeration is built
Example
In mathematics, the decimal system has a radix of ten.
En matemáticas, el sistema decimal tiene una base de diez.
C2 noun /ˈkɒkskoʊm/

Cockscomb

flor de cresta de gallo
Meaning
a tropical plant with bright, velvety flowers that resemble a rooster's comb
Example
The bright red cockscomb flowers added vibrant color to the garden bed.
Las flores de cresta de gallo rojas y brillantes añadieron color vibrante al lecho del jardín.
C2 noun /ɪˌkliːziˈæstɪk/

ecclesiastic

eclesiástico
Meaning
A member of the clergy or church official.
Example
The council was attended by several high-ranking ecclesiastics.
El consejo fue atendido por varios eclesiásticos de alto rango.
C2 noun /ˈkɔːldrən/

caldron

gran caldereta de metal
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 bruja removió su poción en una burbujeante caldereta.
C2 adjective /ˈwɪt.ləs/

Witless

tonto; necio; falto de inteligencia
Meaning
lacking intelligence or wisdom; foolish
Example
His witless remarks during the meeting embarrassed everyone present.
Sus comentarios tontos durante la reunión avergonzaron a todos los presentes.
C2 adjective /ˈdʌktaɪl/

ductile

dúctil
Meaning
capable of being stretched into a thin wire without breaking; easily influenced
Example
Gold is a very ductile metal.
El oro es un metal muy dúctil.
C2 adjective /krəˈmætɪk/

chromatic

cromático
Meaning
Relating to colors or, in music, notes outside the standard scale.
Example
The artist used a chromatic palette to create vibrant contrasts.
El artista usó una paleta cromática para crear contrastes vibrantes.
C2 noun ˌɒbfəsˈkeɪʃən

obfuscation

ofuscación, confusión
Meaning
The action of making something obscure, unclear, or unintelligible.
Example
The obfuscation of the data made it difficult to interpret.
La ofuscación de los datos dificultó su interpretación.
C2 verb /ˈærəˌɡeɪt/

arrogate

apropiarse injustamente
Meaning
To claim or take something without justification.
Example
The dictator arrogated all powers to himself.
El dictador se apropió injustamente de todos los poderes para él mismo.
C2 adjective /ˌnɒnˈtrɪviəl/

nontrivial

no trivial
Meaning
Not simple or easy; requiring effort or significant thought.
Example
Solving the equation turned out to be a nontrivial task.
Resolver la ecuación resultó ser una tarea no trivial.
C2 noun /ˈkærəˌpeɪs/

carapace

caparazón de tortuga o cangrejo
Meaning
the hard shell covering the back of some animals like turtles and crabs
Example
The turtle withdrew into its carapace for protection.
La tortuga se retiró a su caparazón para protegerse.
C2 verb /ˈbleɪzən/

blazon

mostrar
Meaning
to display prominently or vividly
Example
The slogan was blazoned across the banner in bold letters.
El eslogan se mostró en letras negritas en la pancarta.
C2 adjective /ˈnɔɪ.səm/

Noisome

apestoso; dañino o desagradable
Meaning
having an extremely offensive smell; harmful or unpleasant
Example
The noisome smell from the garbage made everyone cover their noses.
El apestoso olor de la basura hizo que todos se taparan las narices.
C2 noun, adjective /ˌæntiˌspæzˈmɒdɪk/

antispasmodic

antiespasmódico
Meaning
A drug or agent that relieves or prevents muscle spasms.
Example
The doctor prescribed an antispasmodic to ease the pain.
El doctor recetó un antiespasmódico para aliviar el dolor.
C2 adjective /ˈmɔːrɪbʌnd/

Moribund

moribundo; en declive o muerte
Meaning
near death; dying; in a state of decline or decay
Example
The moribund patient was in critical condition.
El paciente moribundo estaba en estado crítico.
C2 adjective /əˈpɜːrtənənt/

appurtenant

pertinente
Meaning
Belonging to or associated with something, often used in legal/property contexts.
Example
The right of way is appurtenant to the landowner’s property.
El derecho de paso es pertinente a la propiedad del propietario.
C2 adjective /ˈsɒmnələnt/

somnolent

somnoliento
Meaning
Sleepy or drowsy; causing a desire to sleep.
Example
The somnolent lecture made half the class fall asleep.
La conferencia somnolienta hizo que la mitad de la clase se quedara dormida.
C2 noun, verb /ˌpæm.fləˈtɪər/

pamphleteer

escritor de panfletos
Meaning
a person who writes or distributes pamphlets, often to promote a political or social cause
Example
In the 18th century, many pamphleteers influenced public opinion.
En el siglo XVIII, muchos escritores de panfletos influyeron en la opinión pública.
C2 noun /ɪmp/

imp

pequeño diablillo travieso
Meaning
a small mischievous devil or sprite; a playful troublemaker
Example
The child was acting like a little imp, hiding his toys everywhere.
El niño se comportaba como un pequeño diablillo, escondiendo sus juguetes por todas partes.
C2 adjective /ˌɪnɪkˈspiːdiənt/

inexpedient

desaconsejable
Meaning
Not advisable, suitable, or practical in the circumstances.
Example
It would be inexpedient to invest without proper research.
Sería desaconsejable invertir sin una investigación adecuada.
C2 noun /ˈθɝː.moʊ.klaɪn/

thermocline

termo-clina
Meaning
A layer in a body of water in which temperature changes rapidly with depth.
Example
The thermocline separates warm surface water from cold deep water.
La termoclina separa el agua cálida de la superficie del agua fría profunda.
C2 adjective /ˈvɑːlətɪv/

volitive

volitivo
Meaning
Relating to the will or the exercise of the will.
Example
The treaty was signed under volitive agreement between both nations.
El tratado fue firmado bajo un acuerdo volitivo entre ambas naciones.
C2 adjective /ˈkɑːrpɪŋ/

carping

quejoso
Meaning
continually complaining or finding fault in a petty way
Example
His carping attitude makes teamwork difficult.
Su actitud quejosa hace que el trabajo en equipo sea difícil.
C2 noun ˈbaɪəʊˌsaɪd

biocide

biocida
Meaning
A chemical substance or microorganism intended to destroy, deter, render harmless, or exert a controlling effect on any harmful organism.
Example
Biocides help control pests and reduce the spread of diseases.
Los biocidas ayudan a controlar las plagas y reducir la propagación de enfermedades.
C2 verb /bɪˈtroʊð/

betroth

prometerse
Meaning
To formally promise to marry someone; to engage.
Example
He was betrothed to the princess at a young age.
Él fue prometido a la princesa a una edad temprana.
C2 adjective /loʊˈkweɪʃəs/

loquacious

locuaz
Meaning
tending to talk a great deal; very talkative
Example
The loquacious child entertained everyone with endless stories.
El niño locuaz entretuvo a todos con historias interminables.
C2 verb /frɪsk/

frisk

registrar
Meaning
To search a person by patting their clothing to check for concealed items.
Example
The security guard frisked the man at the entrance.
El guardia de seguridad registró al hombre en la entrada.
C2 adjective /ˈkæp.ʃəs/

Captious

crítico; que encuentra fallos
Meaning
tending to find fault or raise petty objections; fault-finding; critical
Example
His captious remarks about every small detail made the meeting very unpleasant.
Sus comentarios críticos sobre cada pequeño detalle hicieron que la reunión fuera muy desagradable.
C2 adjective /əˈskjuː/

askew

torcido
Meaning
Not in a straight or level position; crooked or tilted.
Example
The picture on the wall hung slightly askew.
El cuadro en la pared estaba colgado ligeramente torcido.
C2 adjective /ˌseɪpiˈɛnʃəl/

sapiential

relacionado con la sabiduría
Meaning
Relating to wisdom or knowledge, often in a religious or philosophical sense.
Example
The monk shared sapiential teachings with his students.
El monje compartió enseñanzas relacionadas con la sabiduría con sus estudiantes.
C2 noun /məˈʃiː.nɪst/

machinist

maquinista
Meaning
a person who operates machine tools or makes and repairs machines
Example
The machinist carefully adjusted the gears on the lathe.
El maquinista ajustó cuidadosamente los engranajes en el torno.
C2 adjective /bjuːˈkɒlɪk/

bucolic

bucólico
Meaning
Relating to the pleasant aspects of the countryside and country life.
Example
They enjoyed a bucolic picnic by the river.
Ellos disfrutaron de un picnic bucólico junto al río.
C2 adjective /ˈfɛstəl/

festal

relacionado con un festival, festivo
Meaning
relating to a festival or celebration
Example
The hall was decorated in a festal manner for the wedding.
El salón estaba decorado de manera festiva para la boda.
C2 adjective /ˈæstrəl/

astral

astral
Meaning
Relating to the stars or to spiritual, non-physical realms.
Example
Some believe in astral projection, the ability to leave the body and travel spiritually.
Algunas personas creen en la proyección astral, la capacidad de abandonar el cuerpo y viajar espiritualmente.
C2 verb /səˈbɔːrn/

suborn

sobornar
Meaning
to bribe or induce someone unlawfully to perform an act, especially to commit perjury
Example
The lawyer was accused of trying to suborn a witness.
El abogado fue acusado de intentar sobornar a un testigo.
C2 verb /əˈleɪ/

allay

aliviar
Meaning
to reduce the intensity of fear, worry, or pain; to calm
Example
The teacher tried to allay the students’ fears before the exam.
El maestro intentó aliviar los miedos de los estudiantes antes del examen.
C2 verb /ˈstɪp.əl/

stipple

cubrir con pequeños puntos
Meaning
to cover a surface with numerous small dots or specks, often in drawing or painting
Example
The artist stippled the canvas to create a textured effect.
El artista cubrió el lienzo con pequeños puntos para crear un efecto texturizado.
C2 verb /ˈbɒtənaɪz/

botanize

estudiar plantas
Meaning
to study plants in their natural environment
Example
They went to the forest to botanize during their vacation.
Fueron al bosque a estudiar plantas durante sus vacaciones.
C2 adjective /ɡlɪb/

glib

superficial pero insincero
Meaning
speaking easily but without sincerity or depth
Example
The politician gave a glib answer to a serious question.
El político dio una respuesta superficial a una pregunta seria.
C2 adjective /ˈvɪsɪd/

viscid

viscoso
Meaning
Having a thick, sticky consistency.
Example
The sap had a viscid texture that stuck to his hands.
La savia tenía una textura viscosa que se pegaba a sus manos.
C2 verb /ˌriː.kəˈnɔɪ.tər/

reconnoiter

reconocer
Meaning
to make a preliminary inspection or survey, especially of an area for military or strategic purposes
Example
The soldiers reconnoitered the area before advancing.
Los soldados reconocieron el área antes de avanzar.
C2 noun /ˈpɔːrtɛnt/

portent

presagio
Meaning
A sign or warning that something, especially something momentous or calamitous, is likely to happen.
Example
The sudden drop in stock prices was seen as a portent of economic trouble.
La repentina caída de los precios de las acciones fue vista como un presagio de problemas económicos.
C2 noun /lɔːˈdeɪʃən/

laudation

elogio
Meaning
The act of praising or expressing approval.
Example
The poet received much laudation for his moving verses.
El poeta recibió muchos elogios por sus versos conmovedores.