penumbra
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C2 noun /pəˈnʌmbrə/

penumbra

sombra parcial
Meaning
a partially shaded area around the shadow of an object, especially during an eclipse
Example
The moon’s penumbra created a dim shadow over the Earth.
La penumbra de la luna creó una sombra tenue sobre la Tierra.
C2 adjective /juːˈʒʊəriəs/

usurious

usurero
Meaning
Charging excessively high interest rates on loans.
Example
The bank was accused of offering loans at usurious rates.
El banco fue acusado de ofrecer préstamos a tasas usureras.
C2 adjective /juːˈnɪsənənt/

unisonant

armonioso
Meaning
Sounding together or in harmony.
Example
The unisonant voices created a powerful effect.
Las voces armoniosas crearon un efecto poderoso.
C2 noun /rɪˈfɛktəri/

refectory

comedor
Meaning
a dining hall, especially in a monastery, convent, or school
Example
Students had lunch in the refectory.
Los estudiantes almorzaron en el comedor.
C2 adjective /ˈwɪzn feɪst/

wizen-faced

cara arrugada y marchita
Meaning
Having a dry, wrinkled, and withered face.
Example
A wizen-faced old man sat quietly in the corner.
Un hombre con la cara arrugada y marchita se sentó tranquilamente en la esquina.
C2 noun /ˈklærɪən/

Clarion

clarín
Meaning
a shrill narrow-tubed war trumpet; a medieval trumpet with a clear piercing tone
Example
The clarion sounded across the battlefield to signal the charge.
El clarín sonó a través del campo de batalla para señalar el ataque.
C2 verb /fɪˈlændər/

philander

filandear
Meaning
to engage in casual or frivolous romantic or sexual relationships
Example
He was known to philander with many women in town.
Era conocido por filandear con muchas mujeres en la ciudad.
C2 verb /ɪnˈskɒns/

ensconce

acurrucarse, esconderse
Meaning
to settle comfortably or securely in a place; to hide or shelter firmly
Example
She ensconced herself in a cozy armchair by the fireplace.
Ella se enroscó en una cómoda silla junto a la chimenea.
C2 noun /ˈɪŋkjʊbəs/

incubus

espíritu maligno
Meaning
An oppressive or nightmarish burden; in folklore, an evil spirit that lies upon sleeping people.
Example
Debt became an incubus that weighed heavily on the family.
La deuda se convirtió en un espíritu maligno que pesaba mucho sobre la familia.
C2 noun əˌdʌl.təˈreɪ.ʃən

adulteration

adulteración
Meaning
The action of making something poorer in quality by the addition of another substance.
Example
Adulteration of food is a serious health risk.
La adulteración de alimentos es un serio riesgo para la salud.
C2 adjective /ˈlɪsəm/

lissome

delgada, flexible y elegante en movimiento
Meaning
Thin, supple, and graceful in movement.
Example
The dancer moved with a lissome elegance.
La bailarina se movió con una elegancia lísoma.
C2 noun /ˈpæk.ɪ.dɜːrm/

pachyderm

mamífero grande con piel gruesa
Meaning
a large mammal with thick skin, such as an elephant, rhinoceros, or hippopotamus
Example
The zoo had several pachyderms, including elephants and rhinos.
El zoológico tenía varios pachidermos, incluidos elefantes y rinocerontes.
C2 noun /djuːˈplɪsɪti/

duplicity

duplicidad
Meaning
Deceitfulness or double-dealing; dishonesty.
Example
Her duplicity was revealed during the investigation.
Su duplicidad fue revelada durante la investigación.
C2 noun /ˈlɪbərəlɪst/

liberalist

liberalista
Meaning
a person who supports liberal ideas and principles
Example
He is a well-known liberalist advocating human rights.
Él es un conocido liberalista que aboga por los derechos humanos.
C2 noun /ˈdəʊ.lər/

dolor

dolor
Meaning
A state of great sorrow or distress.
Example
The nation was in deep dolor after the tragedy.
La nación estaba en profundo dolor después de la tragedia.
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 /ˈɔːldərmənʃɪp/

aldermanship

cargo de concejal
Meaning
The office, position, or dignity of an alderman.
Example
He was honored with aldermanship after years of service.
Fue honrado con el cargo de concejal después de años de servicio.
C2 noun /ˈbrɪtɪˌsɪzəm/

briticism

palabra o característica del inglés británico
Meaning
a word, phrase, or characteristic feature of British English
Example
The word 'lorry' is a well-known Briticism.
La palabra 'lorry' es un briticismo bien conocido.
C2 noun /ˌɡrɛnəˈdɪə/

grenadier

granadero
Meaning
A soldier who specialized in throwing grenades; later used to describe an elite infantryman.
Example
The grenadier stood proudly at the front of the regiment.
El granadero estaba orgulloso en la parte delantera del regimiento.
C2 verb /ˌfɔːrˈrʌn/

forerun

predecer
Meaning
To go before; to precede in time, place, or action.
Example
Dark clouds often forerun a storm.
Las nubes oscuras a menudo preceden una tormenta.
C2 noun /skʌlˈdʌɡəri/

skulduggery

engaño
Meaning
underhanded or dishonest behavior
Example
The politician was accused of financial skulduggery.
El político fue acusado de estafa financiera.
C2 noun /ˈdɒldrəmz/

doldrums

estancamiento
Meaning
A state of inactivity, stagnation, or low spirits; also a region near the equator with calm winds.
Example
After the project failed, the team was stuck in the doldrums for months.
Después de que el proyecto fracasó, el equipo estuvo en un periodo de estancamiento durante meses.
C2 noun /ˌæntɪˈtɒksɪn/

antitoxin

antitoxina
Meaning
A substance that neutralizes a specific toxin in the body.
Example
The doctor administered an antitoxin to counter the snake venom.
El doctor administró una antitoxina para contrarrestar el veneno de la serpiente.
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 verb, noun /ˈɡoʊld.brɪk/

goldbrick

evitar el trabajo
Meaning
to avoid work or duty; a person who shirks responsibility
Example
He was accused of goldbricking while the rest of the team worked hard.
Fue acusado de evitar el trabajo mientras el resto del equipo trabajaba duro.
C2 adjective /ˈnɒti/

knotty

complicado
Meaning
Complicated, difficult to solve or full of knots.
Example
He faced a knotty legal issue.
Él enfrentó un complicado problema legal.
C2 noun əˈdʒuː.dɪ.kə.tɪv ˈbɒd.i

adjudicative body

organismo adjudicativo
Meaning
An official organization that has the authority to judge disputes and make decisions.
Example
The adjudicative body deliberated on the case.
El organismo adjudicativo deliberó sobre el caso.
C2 noun /ˈstiː.vəˌdɔːr/

stevedore

estibador
Meaning
A person employed to load and unload cargo from ships.
Example
The stevedores worked tirelessly to unload the cargo before dawn.
Los estibadores trabajaron incansablemente para descargar la carga antes del amanecer.
C2 noun /ˈprɑːflɪɡəsi/

profligacy

derroche
Meaning
reckless wastefulness or extravagance
Example
His profligacy with money led him to bankruptcy.
Su derroche de dinero lo llevó a la bancarrota.
C2 adjective /ˌriːkruːˈdɛsənt/

recrudescent

recrudescente
Meaning
reviving or breaking out again after a period of abatement
Example
Recrudescent tensions threatened the fragile ceasefire.
Las tensiones recrudecientes amenazaron el frágil alto el fuego.
C2 noun /ˈeɪ.viˌɛr.i/

aviary

aviario
Meaning
a large enclosure for keeping birds
Example
The zoo built a new aviary for exotic parrots.
El zoológico construyó un nuevo aviario para los loros exóticos.
C2 noun /ˈɛskwaɪər/

esquire

esquire
Meaning
A title of respect often used after a man's name, especially for lawyers in the United States.
Example
John Smith, Esquire, will be representing the client in court.
John Smith, Esquire, representará al cliente en la corte.
C2 noun, verb /ˈtræməl/

trammel

restricción
Meaning
A restriction or impediment to freedom of action; to restrict.
Example
The strict rules trammel the creativity of the students.
Las estrictas reglas truncan la creatividad de los estudiantes.
C2 noun /ˈdeɪ.ɪs/

Dais

estrado
Meaning
a raised platform, typically at one end of a room or hall, for speakers or honored guests
Example
The principal stood on the dais to address the entire school assembly.
El director se paró en el estrado para dirigirse a toda la asamblea escolar.
C2 noun /ˈɒkjʊlɪst/

oculist

optometrista
Meaning
An old-fashioned term for an eye doctor or ophthalmologist.
Example
The village oculist was known for treating various eye diseases.
El oculista del pueblo era conocido por tratar diversas enfermedades oculares.
C2 adjective /baɪˈɛniəl/

biennial

bienal
Meaning
happening every two years
Example
The biennial festival attracts thousands of visitors.
El festival bienal atrae a miles de visitantes.
C2 noun /ˈdɛkəˌɡɒn/

decagon

dodecágono
Meaning
A polygon with ten sides and ten angles.
Example
The geometry teacher drew a perfect decagon on the board.
El profesor de geometría dibujó un decágono perfecto en la pizarra.
C2 noun /kərˈmʌdʒən/

curmudgeon

persona gruñona
Meaning
a bad-tempered, cranky, or irritable person, usually old
Example
The old curmudgeon complained about everything in the neighborhood.
El viejo gruñón se quejaba de todo en el vecindario.
C2 noun /ˈɔːlmənæk/

almanac

almanaque
Meaning
An annual publication containing calendars, weather forecasts, astronomical data, and other useful information.
Example
He consulted the almanac to check the phases of the moon.
Consultó el almanaque para verificar las fases de la luna.
C2 adjective /ɪmˈpræktɪkəbl/

impracticable

impracticable
Meaning
Not capable of being carried out or put into practice.
Example
The plan seemed impracticable due to limited resources.
El plan parecía impracticable debido a los recursos limitados.
C2 noun /ˈɑːbəlɪsk/

obelisk

obelisco
Meaning
A tall, four-sided, narrow tapering monument with a pyramid-shaped top.
Example
The ancient Egyptians built obelisks to honor their gods.
Los antiguos egipcios construyeron obeliscos para honrar a sus dioses.
C2 noun /ˈdɛvɪltrɪ/

deviltry

maldad
Meaning
Cruel or malicious behavior; mischief with an evil aspect.
Example
The villain’s deviltry terrified the townsfolk.
La maldad del villano aterrorizó a los habitantes del pueblo.
C2 noun /ˈmɒdɪkəm/

modicum

una pequeña cantidad
Meaning
a small or moderate amount of something, especially something valuable or desirable
Example
She showed a modicum of patience during the long meeting.
Ella mostró una pequeña cantidad de paciencia durante la larga reunión.
C2 noun /əˈblɪkwɪti/

obliquity

oblicuidad
Meaning
Deviation from moral or usual conduct; indirectness or lack of straightforwardness.
Example
The politician was criticized for the obliquity of his answers.
El político fue criticado por la oblicuidad de sus respuestas.
C2 noun /ɪˈfrʌntəri/

effrontery

descaro o audacia ruda
Meaning
shameless or rude boldness
Example
He had the effrontery to lie even when caught red-handed.
Él tuvo el descaro de mentir incluso cuando lo atraparon con las manos en la masa.
C2 noun /ˈpæn.θi.ɪ.zəm/

pantheism

panteísmo
Meaning
The belief that God and the universe are identical, or that everything is a manifestation of God.
Example
Spinoza’s philosophy is often associated with pantheism.
La filosofía de Spinoza a menudo se asocia con el panteísmo.
C2 noun /ˈwɪndbæɡ/

windbag

persona habladora
Meaning
a person who talks too much, especially in a boring or boastful way
Example
Everyone avoided the windbag at the party because he never let anyone else speak.
Todos evitaron al hablador en la fiesta porque nunca dejaba hablar a nadie más.
C2 adjective /ˈfʊl.dʒənt/

fulgent

brillante
Meaning
Shining brightly; dazzling.
Example
The fulgent stars lit up the night sky.
Las estrellas brillantes iluminaron el cielo nocturno.
C2 noun /ˌæk.wiˈes.əns/

acquiescence

acuerdo tácito
Meaning
The reluctant acceptance of something without protest.
Example
His silent acquiescence to unfair rules was surprising.
Su silencioso acuerdo tácito con las reglas injustas fue sorprendente.
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 adjective /mɛnˈdeɪʃəs/

mendacious

mentiroso
Meaning
not telling the truth; lying
Example
The politician was known for his mendacious statements.
El político era conocido por sus declaraciones mentirosas.
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 noun /ˈæp.ɪˌkʌl.tʃər/

apiculture

apicultura
Meaning
The practice of keeping and raising bees for honey and other products.
Example
Apiculture plays a vital role in agriculture by supporting pollination.
La apicultura juega un papel vital en la agricultura al apoyar la polinización.
C2 verb /ˈæd.ʌm.breɪt/

adumbrate

presagiar
Meaning
to foreshadow or suggest something in an unclear or indirect way
Example
The report adumbrates future economic challenges.
El informe presagia futuros desafíos económicos.
C2 noun /əˈstɪɡmətɪzəm/

astigmatism

astigmatismo
Meaning
An eye defect causing blurred vision due to irregular curvature of the cornea or lens.
Example
She wears glasses to correct her astigmatism.
Ella usa gafas para corregir su astigmatismo.
C2 noun /ˈfɪlɪɡri/

filigree

trabajo ornamental delicado, generalmente de oro o plata
Meaning
delicate ornamental work of fine wire, usually of gold or silver
Example
The necklace was decorated with intricate gold filigree.
El collar estaba decorado con intrincados filigríes de oro.
C2 noun /sɜːrˈsiːs/

surcease

cese
Meaning
a temporary or final ending or stopping of something
Example
The noise finally came to a surcease after midnight.
El ruido finalmente llegó a un cese después de medianoche.
C2 noun /ˈleɪ.ɪ.ti/

laity

laicos
Meaning
Ordinary members of a religious community who are not clergy.
Example
The church welcomed the laity to participate in the event.
La iglesia dio la bienvenida a los laicos para participar en el evento.
C2 verb /ˌsuːpərˈæn.ju.eɪt/

superannuate

jubilar con pensión
Meaning
to retire someone with a pension, usually due to age or long service
Example
The company decided to superannuate its senior employees after thirty years of service.
La empresa decidió jubilar con pensión a sus empleados senior después de treinta años de servicio.
C2 noun /ˈbɒnəmi/

bonhomie

bonhomía
Meaning
Cheerful friendliness and geniality.
Example
The meeting was filled with laughter and bonhomie.
La reunión estaba llena de risas y bonhomía.
C2 noun /ˌsuːdəˈnɪmɪti/

pseudonymity

uso de seudónimo
Meaning
the practice or state of using a pseudonym
Example
The author maintained pseudonymity throughout her career.
La autora mantuvo el uso de seudónimo durante toda su carrera.
C2 noun /ˈæmpərˌsænd/

ampersand

ampersand
Meaning
The symbol '&' used to represent the word 'and'.
Example
Use an ampersand instead of writing the word 'and' in the company name.
Usa un ampersand en lugar de escribir la palabra 'y' en el nombre de la empresa.
C2 verb /ˈtɪtəleɪt/

titillate

excitar
Meaning
To excite or amuse, especially in a slightly sexual or playful way.
Example
The comedian's jokes titillated the audience.
Los chistes del comediante excitaban a la audiencia.
C2 noun /ˈsɛnʃəns/

sentience

sentiencia
Meaning
The capacity to feel, perceive, or experience subjectively.
Example
Many argue that animals possess sentience.
Muchos argumentan que los animales poseen sentiencia.
C2 noun /ˈkɪləˌliːtər/

kiloliter

kilolitro
Meaning
a unit of capacity equal to 1,000 liters
Example
The tank can hold up to three kiloliters of water.
El tanque puede contener hasta tres kilolitros de agua.
C2 adjective /rɪˈfʌldʒənt/

refulgent

resplandeciente
Meaning
Shining brightly; radiant.
Example
The refulgent sun lit up the entire valley.
El sol resplandeciente iluminó todo el valle.
C2 noun /ˌfjuːzɪˈleɪd/

fusillade

fuselaje
Meaning
A series of shots fired or missiles thrown all at the same time or in quick succession.
Example
The soldiers advanced under a fusillade of bullets.
Los soldados avanzaron bajo una fusilada de balas.
C2 noun /ˈvɛstmənt/

vestment

vestimenta religiosa
Meaning
a garment, especially a ceremonial or official robe worn during religious services
Example
The priest wore a golden vestment during the ceremony.
El sacerdote usó una vestimenta dorada durante la ceremonia.
C2 adjective /ləˈsɪviəs/

lascivious

lascivo
Meaning
showing an overt and often offensive sexual desire
Example
The lascivious remarks made everyone uncomfortable.
Las observaciones lascivas hicieron que todos se sintieran incómodos.
C2 noun /ˈeb.taɪd/

Ebb-tide

baja de marea
Meaning
the movement of the tide out to sea; a time when the sea level is falling
Example
During ebb-tide, we could walk further out on the beach.
Durante la baja de marea, podíamos caminar más lejos en la playa.
C2 noun /ˌɛpɪzəʊˈɒtɪk/

epizootic

epizootia
Meaning
An outbreak of disease affecting many animals of one kind at the same time.
Example
The farmer feared an epizootic might wipe out his cattle.
El granjero temía que una epizootia pudiera exterminar su ganado.
C2 noun /ˈtʃaɪ.nə roʊz/

China-rose

hibisco
Meaning
a tropical flowering plant with large, showy flowers in various colors
Example
The bright red China-rose flowers decorated the entrance of the house.
Las brillantes flores rojas de hibisco decoraban la entrada de la casa.
C2 verb /ˈstjuːpɪˌfaɪ/

stupefy

dejar atónito
Meaning
to make someone unable to think clearly, usually because of surprise or shock
Example
The magician's tricks stupefied the audience.
Los trucos del mago dejaron atónita a la audiencia.
C2 adjective /prɪˈzʌmptɪv/

presumptive

presunto
Meaning
Based on probability or assumption rather than proof.
Example
She is the presumptive nominee for the party.
Ella es la nominada presunta para el partido.
C2 adjective /dɪˈrɒɡətɪv/

derogative

despectivo
Meaning
Expressing a low opinion or showing lack of respect.
Example
He made a derogative remark about her work.
Hizo un comentario despectivo sobre su trabajo.
C2 noun /ˌdaɪvəˈɡeɪʃən/

divagation

divagación
Meaning
digression; wandering from a path or subject
Example
His lecture was full of divagation, making it hard to follow the main point.
Su conferencia estuvo llena de divagaciones, lo que hizo difícil seguir el punto principal.
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.
Su estilo de escritura inimitable lo convirtió en una leyenda literaria.
C2 noun /ˌɑːrbəˈriːtəm/

arboretum

arborétum
Meaning
a place where trees, shrubs, and plants are grown for scientific study or public display
Example
We visited the city’s arboretum to learn about exotic trees.
Visitamos el arborétum de la ciudad para aprender sobre árboles exóticos.
C2 noun /ˌɒktədʒəˈnɛəriən/

octogenarian

octogenario
Meaning
A person who is between 80 and 89 years old.
Example
The octogenarian still jogs every morning to stay healthy.
El octogenario aún corre todas las mañanas para mantenerse saludable.
C2 verb /ˌoʊvərˈstraɪd/

overstride

cruzar dando pasos largos
Meaning
To stride over something; to step across with long steps.
Example
He managed to overstride the narrow stream with ease.
Él logró cruzar el estrecho arroyo con facilidad.
C2 noun /ˈθrɛnədi/

threnody

canto fúnebre, elegía
Meaning
A song, poem, or speech of mourning for someone who has died; a lament.
Example
The poet composed a moving threnody for the fallen soldiers.
El poeta compuso una conmovedora elegía para los soldados caídos.
C2 adjective /ˈvjuː.ləs/

Viewless

invisible; sin opiniones
Meaning
invisible; having no views or opinions
Example
The ghost remained viewless to most people in the haunted house.
El fantasma permaneció invisible para la mayoría de las personas en la casa encantada.
C2 noun /ˈfɪl.ɪ.staɪn/

philistine

persona indiferente o hostil hacia la cultura y las artes
Meaning
a person who is indifferent or hostile to culture and the arts
Example
He was criticized as a philistine for dismissing modern art.
Fue criticado como un filisteo por rechazar el arte moderno.
C2 noun /ˈpɛntəˌɡræm/

pentagram

pentagrama
Meaning
A five-pointed star often used as a symbol in magic, mysticism, or religion.
Example
The wizard drew a pentagram on the floor as part of the ritual.
El mago dibujó un pentagrama en el suelo como parte del ritual.
C2 noun /ˈθiː.ɑːr.ki/

thearchy

tearquía
Meaning
Rule or government by the gods; divine sovereignty.
Example
In ancient cultures, some societies believed in thearchy where gods directly guided human affairs.
En las culturas antiguas, algunas sociedades creían en la tearquía, donde los dioses guiaban directamente los asuntos humanos.
C2 adjective /ˌvɪtriˈɑːlɪk/

vitriolic

crítico mordaz
Meaning
filled with bitter criticism or malice
Example
His vitriolic remarks hurt everyone in the room.
Sus comentarios críticos mordaces hirieron a todos en la sala.
C2 noun /ʃiːf/

sheaf

manojo de trigo
Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
El agricultor llevaba un manojo de trigo sobre su hombro.
C2 noun /ˈdɒkɪt/

docket

lista
Meaning
a list or schedule of cases to be tried in a court or items to be done
Example
The judge reviewed the docket before starting the session.
El juez revisó la lista antes de comenzar la sesión.
C2 noun /ˈmɒnəˌsɪləbəl/

monosyllable

palabra monosílaba
Meaning
A word consisting of only one syllable.
Example
Words like 'yes' and 'no' are monosyllables.
Palabras como 'sí' y 'no' son monosílabos.
C2 noun /traɪst/

tryst

encuentro secreto
Meaning
a private romantic meeting between lovers
Example
They arranged a secret tryst in the park.
Arreglaron un encuentro secreto en el parque.
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 /ˈoʊɡər/

ogre

ogro
Meaning
A mythical monster, often depicted as large, hideous, and cruel; metaphorically, a cruel or terrifying person.
Example
The villagers feared the ogre who lived in the dark forest.
Los aldeanos temían al ogro que vivía en el bosque oscuro.
C2 noun /ˈstrɪndʒənsi/

stringency

rigidez
Meaning
the quality of being strict, precise, or severe
Example
The stringency of the new rules surprised everyone.
La rigidez de las nuevas reglas sorprendió a todos.
C2 noun /krəˈdjuːlɪti/

credulity

credulidad
Meaning
A tendency to be too ready to believe that something is real or true.
Example
The scam succeeded because of the victim's credulity.
El fraude tuvo éxito debido a la credulidad de la víctima.
C2 noun /ˌviːələnsɛloʊ/

violoncello

chelo
Meaning
The full name of the cello, a large string instrument played with a bow and held between the knees.
Example
He practiced the violoncello for hours each day.
Practicó el violonchelo durante horas cada día.
C2 adjective /sɒmˈnɪfərəs/

somniferous

somnífero
Meaning
Tending to induce sleep; soporific.
Example
The professor's somniferous lecture put half the class to sleep.
La conferencia somnífera del profesor puso a la mitad de la clase a dormir.
C2 noun /bænˈdænə/

bandanna

pañuelo grande y colorido
Meaning
A large, often brightly colored handkerchief, typically worn on the head or around the neck.
Example
He tied a red bandanna around his neck.
Se ató un pañuelo rojo alrededor del cuello.
C2 adjective /rɪˈtɪkjʊlət/

reticulate

reticulado
Meaning
Having a net-like pattern or structure.
Example
The leaf had a reticulate pattern of veins.
La hoja tenía un patrón reticulado de venas.
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 adjective /ˌpɛnɪˈtɛnʃəl/

penitential

penitente
Meaning
Relating to or expressing penitence or penance.
Example
The priest delivered a penitential sermon on forgiveness.
El sacerdote dio un sermón penitente sobre el perdón.
C2 noun /ˈpriːsɛpt/

precept

precepto
Meaning
A general rule intended to regulate behavior or thought.
Example
Honesty is a fundamental precept in all religions.
La honestidad es un precepto fundamental en todas las religiones.
C2 adjective /ˈpɛkənt/

peccant

culpable
Meaning
Guilty of a moral offense or wrongdoing; sinful.
Example
The judge declared the peccant official unfit for office.
El juez declaró al oficial culpable no apto para el cargo.
C2 verb /ɪnˈtɜːr/

inter

enterrar
Meaning
To bury a dead body in the ground.
Example
They decided to inter the soldier with full honors.
Ellos decidieron enterrar al soldado con todos los honores.
C2 verb /aʊtˈraɪd/

outride

adelantar
Meaning
to ride faster, farther, or better than someone else
Example
The young rider managed to outride his competitors in the race.
El joven jinete logró adelantar a sus competidores en la carrera.
C2 noun /ˌkiː.təʊˈdʒen.ɪ.sɪs/

ketogenesis

proceso de producción de cetonas
Meaning
The metabolic process by which the liver produces ketones from fatty acids, providing an alternative energy source during low carbohydrate availability.
Example
Ketogenesis occurs during fasting or low-carb diets.
La cetogénesis ocurre durante el ayuno o dietas bajas en carbohidratos.
C2 noun əˈkjuː.ə.ti

acuity

agudeza
Meaning
Sharpness or keenness of thought, vision, or hearing.
Example
His intellectual acuity made him a brilliant scientist.
Su agudeza intelectual lo convirtió en un brillante científico.
C2 noun /ˈsɒfɪstri/

sophistry

sofistería
Meaning
the use of clever but false arguments, often to deceive
Example
The politician's speech was full of sophistry.
El discurso del político estaba lleno de sofistería.
C2 adverb /ˌɪnəzˈmʌtʃ/

inasmuch

en la medida en que
Meaning
To the extent that; considering that.
Example
Inasmuch as you are their teacher, you should guide them carefully.
En la medida en que eres su maestro, deberías guiarlos cuidadosamente.
C2 noun /kəˈdɛnzə/

cadenza

un pasaje solista elaborado
Meaning
An elaborate solo passage in a piece of music, usually near the end.
Example
The pianist performed a brilliant cadenza before the final movement.
El pianista realizó una brillante cadenza antes del movimiento final.
C2 noun /ˈænɪməlˌkjuːl/

animalcule

animalcule
Meaning
A microscopic animal, especially a protozoan or other minute organism.
Example
The scientist observed an animalcule moving under the microscope.
El científico observó un animalcule moviéndose bajo el microscopio.
C2 adjective /ˈsiːkwənt/

sequent

secuente
Meaning
Following in order or as a result.
Example
The sequent events changed the course of history.
Los eventos subsecuentes cambiaron el curso de la historia.
C2 noun /ˈfaɪər.brænd/

firebrand

persona revolucionaria
Meaning
a person who is passionate about a cause, often inciting change or action
Example
The activist was a true firebrand, inspiring everyone around him to join the protest.
El activista era un verdadero revolucionario, inspirando a todos a su alrededor para unirse a la protesta.
C2 adjective /juːˈfoʊniəs/

euphonious

sonido armonioso
Meaning
Pleasing to the ear; having a sweet sound.
Example
The poet's euphonious language made the verse a delight to read.
El lenguaje eufónico del poeta hizo que el verso fuera un deleite para leer.
C2 noun /ˌfoʊˈtɑːmɪtər/

photometer

fotómetro
Meaning
an instrument for measuring the intensity of light
Example
The scientist used a photometer to measure the light in the laboratory.
El científico usó un fotómetro para medir la luz en el laboratorio.
C2 noun /ˌpɛrəɡrɪˈneɪʃən/

peregrination

peregrinación
Meaning
A long journey or wandering, especially on foot.
Example
Their peregrination across Asia lasted two years.
Su peregrinación a través de Asia duró dos años.
C2 noun /ˌhaɪdroʊdaɪˈnæmɪks/

hydrodynamics

hidrodinámica
Meaning
The branch of science concerned with the motion of fluids, especially liquids, and the forces acting on solid bodies immersed in fluids.
Example
Hydrodynamics is essential in designing efficient ship hulls.
La hidrodinámica es esencial para disenar cascos de barcos eficientes.
C2 noun /ˈmeɪsə/

mesa

meseta
Meaning
An isolated flat-topped hill with steep sides, found in arid regions.
Example
The hikers stopped to admire the mesa rising above the desert floor.
Los excursionistas se detuvieron para admirar la meseta que se alzaba sobre el suelo del desierto.
C2 adjective /fluːˈɛnʃəl/

fluential

influyente
Meaning
Having the power to influence or flowing freely (rare/archaic usage).
Example
The fluential speaker captivated the entire audience.
El orador influyente cautivó a toda la audiencia.
C2 noun /ˌsuːpərɪnˈtɛndəns/

superintendence

supervisión
Meaning
the act of overseeing, supervising, or managing
Example
The superintendence of the school is the principal’s duty.
La supervisión de la escuela es deber del director.
C2 adjective /ˌhaɪpərˈkrɪtɪkl/

hypercritical

hipercrítico
Meaning
Excessively or unreasonably critical.
Example
The teacher was often hypercritical of small mistakes.
El maestro era a menudo hipercrítico con los pequeños errores.
C2 verb /ˈwaŋɡl/

wangle

obtener algo con astucia
Meaning
To achieve something by clever or sometimes dishonest persuasion or trickery.
Example
He wangled a free ticket to the concert.
Consiguió una entrada gratuita para el concierto con astucia.