quark
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C2 noun kwɔːrk

quark

quark
Meaning
A fundamental subatomic particle that combines to form protons and neutrons.
Example
Quarks form protons and neutrons.
Los quarks forman protones y neutrones.
C2 noun /ˈkwɒdrʊpɛd/

quadruped

cuadrúpedo
Meaning
an animal that walks on four feet
Example
Most mammals are quadruped creatures adapted for running and stability.
La mayoría de los mamíferos son criaturas cuadrúpedas, adaptadas para correr y para mantener la estabilidad.
C2 noun /ˌkiː ˈviːv/

qui vive

alerta
Meaning
A state of alertness or vigilance.
Example
The guards were on the qui vive during the night.
Los guardias estaban en alerta durante la noche.
A2 adjective /ˈkwaɪ.ɪt/

Quiet

silencioso; tranquilo; calmado; haciendo poco o ningún ruido
Meaning
silent; peaceful; calm; making little or no noise
Example
Please keep quiet during the movie.
Por favor, manténganse en silencio durante la película.
C1 noun /ˈkwɒn.dər.i/

Quandary

dilema; incertidumbre
Meaning
a difficult situation where you cannot decide what to do; dilemma
Example
She was in a quandary about which job offer to accept.
Ella estaba en un dilema sobre qué oferta de trabajo aceptar.
C2 noun /kwɪˈɛsəns/

quiescence

quiescencia
Meaning
A state of quietness, inactivity, or dormancy.
Example
The volcano has been in a state of quiescence for decades.
El volcán ha estado en un estado de quiescencia durante décadas.
C1 noun /kwɪnˈtɛt/

quintet

quinteto
Meaning
A group of five people or things, especially musicians.
Example
The jazz quintet performed beautifully.
El quinteto de jazz tocó maravillosamente.
C1 noun /kiː/

quay

muelle
Meaning
A platform lying alongside or projecting into water for loading and unloading ships.
Example
The cargo was unloaded at the quay.
La carga fue descargada en el muelle.
C1 noun/verb /ˈkwɒr.i/

quarry

cantera / presa
Meaning
A place where stone or minerals are extracted; also means prey when hunted.
Example
The workers quarried limestone from the hill.
Los trabajadores extrajeron piedra caliza de la colina.
B2 adjective /ˈkwɜːrki/

quirky

peculiar
Meaning
Unusual in an interesting, charming, or odd way.
Example
She has a quirky sense of fashion that makes her stand out.
Ella tiene un sentido de la moda peculiar que la hace destacar.
B2 adjective /ˈkwɑːn.tɪ.teɪ.tɪv/

Quantitative

cuantitativo
Meaning
relating to quantity or amount; expressed in terms of numbers or measurements
Example
The study provides quantitative evidence of climate change effects.
El estudio proporciona evidencia cuantitativa de los efectos del cambio climático.
C1 verb, noun /kweɪl/

quail

atemorizarse; un pájaro pequeño de cola corta
Meaning
verb: to feel or show fear; noun: a small, short-tailed bird
Example
She quailed at the sight of the approaching storm.
Ella se acobardó al ver la tormenta que se acercaba.
C1 adjective /ˈkwɑː.drʊ.pəl/

Quadruple

cuádruple
Meaning
four times as much or as many; consisting of four parts
Example
The company's profits have shown quadruple growth this year.
Las ganancias de la empresa han mostrado un crecimiento cuádruple este año.
B2 noun ˈkwəʊ.tə

quota

cuota
Meaning
A limited or fixed number or amount of people or things, in particular.
Example
The quota reform was a key demand.
La reforma de la cuota fue una demanda clave.
C1 adjective /ˈkwɪzɪkəl/

quizzical

desconcertado, inquisitivo
Meaning
Expressing mild or amused puzzlement.
Example
She gave him a quizzical look when he made the strange comment.
Ella le dio una mirada desconcertada cuando él hizo el comentario extraño.
C2 verb, noun /ˈkweɪvər/

quaver

temblar
Meaning
To shake or tremble in speaking, typically through nervousness or emotion.
Example
Her voice quavered as she spoke before the crowd.
Su voz temblaba mientras hablaba frente a la multitud.
C1 noun /ˈkwɔːrəm/

quorum

quórum
Meaning
The minimum number of members needed to conduct official business in a meeting.
Example
The board meeting was postponed because there was no quorum.
La reunión de la junta fue pospuesta porque no había quórum.
C1 adjective ˌkwɪn.tɪˈsen.ʃəl

quintessential

ejemplo perfecto o típico de una cualidad o clase
Meaning
representing the most perfect or typical example of a quality or class.
Example
The artist's work is the quintessential example of modernism.
El trabajo del artista es el ejemplo quintessential del modernismo.
B1 verb /ˈkwɒlɪfaɪ/

qualify

calificar
Meaning
to successfully complete a course or pass an exam; to become eligible
Example
She worked hard to qualify for the competition.
Ella trabajó duro para calificar para la competencia.
B2 noun /kwəʊˈteɪʃən/

quotation

cita; presupuesto
Meaning
a group of words taken from a text or speech and repeated exactly; an estimated price given for goods or services
Example
The article opened with a famous quotation from Shakespeare.
El artículo comenzó con una cita famosa de Shakespeare.
B1 noun /kjuː/

Queue

columna; fila
Meaning
a line of people or things waiting for something; a sequence
Example
We had to wait in a long queue to buy tickets for the movie.
Tuvimos que esperar en una larga fila para comprar los boletos para la película.
A2 noun /kwiːn/

queen

reina
Meaning
a female ruler of a country or the wife of a king
Example
The queen addressed her people with grace.
La reina se dirigió a su pueblo con gracia.
A1 adverb /ˈkwɪk.li/

Quickly

rápidamente; rápidamente
Meaning
at a fast speed; with little delay; rapidly
Example
He quickly finished his homework.
Él terminó su tarea rápidamente.
C2 adjective /kwaɪˈesnt/

Quiescent

inactivo; tranquilo; apacible;
Meaning
quiet; peaceful; inactive; dormant; at rest
Example
The volcano has been quiescent for over a century.
El volcán ha estado inactivo por más de un siglo.
C2 noun /kwaɪˈiːtəs/

Quietus

muerte o algo que causa la muerte; una resolución final
Meaning
death or something that causes death; a final settlement
Example
The hero received his quietus from the villain's sword.
El héroe recibió su quietus de la espada del villano.
B1 noun /ˈkwɒl.ɪ.ti taɪm/

quality time

tiempo de calidad
Meaning
Time spent giving someone your full attention in order to strengthen your relationship with them.
Example
Spending quality time with family enhances relationships.
Pasar tiempo de calidad con la familia mejora las relaciones.
B2 noun /ˈkwɔːtərˌbæk/

quarterback

mariscal de campo
Meaning
the player who directs a team’s offense in American football
Example
The quarterback threw a perfect pass.
El mariscal de campo lanzó un pase perfecto.
C2 adjective /kwəʊˈtɪdiən/

quotidian

cotidiano, común
Meaning
Ordinary or everyday, especially when mundane.
Example
He focused on the quotidian details of family life.
Él se centró en los detalles cotidianos de la vida familiar.
C1 noun /ˈkwæɡˌmaɪər/

quagmire

pantano, embrollo
Meaning
a soft, wet area of land that gives way underfoot; a complex or dangerous situation
Example
The hikers were trapped in a political quagmire.
Los excursionistas quedaron atrapados en un embrollo político.
C1 noun /kwæk/

Quack

charlatán
Meaning
a person who pretends to be a doctor but has no medical training; the sound a duck makes
Example
People should be careful not to trust medical advice from a quack.
Las personas deben tener cuidado de no confiar en consejos médicos de un charlatán.
B2 noun ˈkwɒlɪti sliːp

quality sleep

sueño de calidad
Meaning
Deep and healthy sleep that is adequate and restorative, ensuring physical and mental well-being
Example
Quality sleep improves cognitive function and overall health.
El sueño de calidad mejora la función cognitiva y la salud en general.
C2 adjective /ˈkwɛrʊləs/

querulous

quejoso
Meaning
Complaining in a whining or irritable manner.
Example
The querulous customer kept finding fault with every detail.
El cliente quejoso seguía encontrando fallos en cada detalle.
C1 verb /kwɛl/

quell

sofocar
Meaning
To suppress or put an end to something, usually by force.
Example
The police were called to quell the violent protest.
La policía fue llamada para sofocar la protesta violenta.
C1 verb /kwentʃ/

quench

calmar
Meaning
to satisfy thirst by drinking; to extinguish fire
Example
He drank water to quench his thirst after the long run.
Él bebió agua para calmar su sed después de la larga carrera.
B2 noun /ˈkwɔː.tərz/

Quarters

alojamiento; cuarteles; alojamiento militar
Meaning
living accommodation; lodgings; military housing
Example
The soldiers returned to their quarters after the training exercise.
Los soldados regresaron a sus cuarteles después del ejercicio de entrenamiento.
C2 noun /ˈkwɪkˌsɪlvər/

quicksilver

mercurio
Meaning
Mercury; a liquid metal, or something that is quick and unpredictable.
Example
His mood was as changeable as quicksilver.
Su estado de ánimo era tan cambiante como el mercurio.
A2 verb /kwɪt/

quit

dejar
Meaning
to stop doing something; to leave a job or position
Example
She decided to quit her job and start her own business.
Ella decidió dejar su trabajo y empezar su propio negocio.
C1 noun /kwɑːm/

qualm

duda
Meaning
a feeling of doubt, worry, or fear about something
Example
She had no qualm about speaking her mind.
Ella no tuvo duda en decir lo que pensaba.
B2 adjective /ˈkwɑː.lɪ.teɪ.tɪv/

Qualitative

cualitativo
Meaning
relating to quality or character rather than quantity; descriptive rather than numerical
Example
The research focuses on qualitative analysis rather than numbers.
La investigación se enfoca en análisis cualitativo más que en números.
C1 noun (plural) /kwɑːmz/

qualms

dudas
Meaning
feelings of doubt, worry, or uneasiness
Example
He had serious qualms about accepting the offer.
Él tenía serias dudas sobre aceptar la oferta.
C2 noun /kwiːn kreɪp ˈmɜːrtəl/

Queen crape myrtle

Myrtillo de crepé de la reina
Meaning
A flowering tree with colorful, crepe-like flowers, scientifically known as Lagerstroemia
Example
The Queen crape myrtle bloomed beautifully in the garden with its purple flowers.
El myrtillo de crepé de la reina floreció hermosamente en el jardín con sus flores moradas.
C1 adjective /ˈkwɑː.rəl.səm/

Quarrelsome

pendenciero; belicoso; argumentativo
Meaning
given to arguing and fighting; argumentative and confrontational
Example
His quarrelsome nature makes it difficult to work with him.
Su naturaleza pendenciera hace que sea difícil trabajar con él.
B2 noun /kwɪlt/

Quilt

edredón
Meaning
a warm bed covering made of padding enclosed between layers of fabric
Example
Grandmother made a beautiful quilt with colorful patches for my bed.
La abuela hizo un hermoso edredón con parches coloridos para mi cama.
B2 noun/verb /ˈkwɒr.ən.tiːn/

quarantine

cuarentena
Meaning
A period of isolation to prevent the spread of disease.
Example
The travelers were placed in quarantine for two weeks.
Los viajeros fueron colocados en cuarentena durante dos semanas.
A2 adverb /ˈkwaɪ.ət.li/

Quietly

silenciosamente; en calma
Meaning
without making much noise; silently; in a calm manner
Example
She spoke quietly so she wouldn't wake the baby.
Ella habló en voz baja para no despertar al bebé.
B2 noun /ˈkwɪə.ri/

Query

consulta; pregunta;
Meaning
a question or inquiry; a request for information
Example
I have a query about the new policy changes in the company.
Tengo una consulta sobre los nuevos cambios de política en la empresa.
C1 verb/noun /ˈkwɪbəl/

quibble

discutir sobre algo trivial
Meaning
To argue or raise objections about a trivial matter; a petty objection.
Example
They quibbled over who should pay the bill.
Ellos discutieron sobre quién debía pagar la cuenta.
B1 verb /kwoʊt/

quote

citar
Meaning
to repeat someone else's words; to give a price or estimate
Example
The teacher asked students to quote the famous author in their essays.
El maestro pidió a los estudiantes que citaran al autor famoso en sus ensayos.
C2 noun /ˈkwaɪəˌtuːd/

quietude

quietud
Meaning
A state of stillness and tranquility.
Example
She enjoys the quietude of the countryside.
Ella disfruta de la quietud del campo.
B2 adjective /ˈkwɔːrtərli/

Quarterly

trimestral
Meaning
occurring every three months; relating to a quarter of a year
Example
The company publishes quarterly reports to shareholders.
La empresa publica informes trimestrales a los accionistas.
C1 verb /ˈkwɪkən/

quicken

acelerar
Meaning
to make or become faster; to accelerate
Example
His pulse began to quicken as he approached the finish line.
Su pulso empezó a acelerarse a medida que se acercaba a la meta.
C1 verb /ˈkwentʃɪŋ/

quenching

saciar / apagar
Meaning
The act of satisfying thirst or extinguishing something like fire.
Example
Drinking cold water was quenching her thirst.
Beber agua fría estaba saciando su sed.
A1 noun /ˈkwes.tʃən/

Question

pregunta; frase interrogativa;
Meaning
a sentence asking for information or a response; an interrogative expression
Example
The teacher asked a difficult question during the exam.
El maestro hizo una pregunta difícil durante el examen.
B1 noun /ˌkwɒl.ɪ.fɪˈkeɪ.ʃən/

Qualification

cualificación; habilidad
Meaning
official record showing that someone has finished a training course or has necessary skills; condition or requirement
Example
She has the right qualifications for this engineering job.
Ella tiene las cualificaciones adecuadas para este trabajo de ingeniería.
B2 noun /ˌkwes.tʃəˈneər/

questionnaire

cuestionario
Meaning
a set of written questions used to collect information or opinions
Example
Participants filled out a detailed questionnaire about their habits.
Los participantes llenaron un cuestionario detallado sobre sus hábitos.
B2 adjective /ˈkwestʃənəbl/

Questionable

cuestionable
Meaning
doubtful; dubious; suspicious; open to doubt or suspicion
Example
His questionable business practices led to an investigation.
Sus prácticas comerciales cuestionables llevaron a una investigación.
A1 adjective /kwɪk/

Quick

rápido
Meaning
fast; rapid; swift; happening in a short time
Example
She gave a quick answer to the teacher's question.
Ella dio una respuesta rápida a la pregunta del profesor.
A2 noun ˈkwɒl.ɪ.ti

quality

calidad
Meaning
The standard of something as measured against other things of a similar kind; the degree of excellence of something.
Example
Quality assurance is vital in medical education.
La garantía de calidad es vital en la educación médica.
C2 noun /ˈkwɪzlɪŋ/

quisling

traidor
Meaning
A traitor who collaborates with an enemy force occupying their country.
Example
During the war, he was branded a quisling for aiding the invaders.
Durante la guerra, fue etiquetado como un quisling por ayudar a los invasores.
C2 verb /kwɒf/

quaff

beber de un trago
Meaning
to drink something heartily or in large gulps, especially an alcoholic drink
Example
He quaffed a mug of ale after the long day.
Él bebió de un trago una jarra de cerveza después del largo día.
C1 adjective /kwɪər/

Queer

extraño; inusual; peculiar
Meaning
strange; unusual; peculiar; odd
Example
The old house had a queer atmosphere that made visitors uncomfortable.
La casa antigua tenía una atmósfera extraña que hacía sentir incómodos a los visitantes.
C1 noun /kwɔːrˈtɛt/

quartet

cuarteto
Meaning
A group of four people playing music or singing together.
Example
The string quartet performed beautifully at the concert.
El cuarteto de cuerdas actuó maravillosamente en el concierto.
A2 adverb /kwaɪt/

Quite

bastante; bastante; completamente
Meaning
to a considerable extent; fairly; rather; completely
Example
The movie was quite interesting.
La película fue bastante interesante.
C1 noun/verb /kwɪp/

quip

comentario ingenioso
Meaning
A witty remark; to make a witty or clever comment.
Example
She quipped about the weather during the meeting.
Ella hizo un comentario ingenioso sobre el clima durante la reunión.
B2 noun /ˈkwɒr.əl/

Quarrel

pelea; disputa
Meaning
an angry argument or disagreement between people
Example
They had a quarrel about money and stopped talking to each other.
Tuvieron una pelea por el dinero y dejaron de hablarse entre ellos.
B2 verb /kweɪk/

quake

temblar
Meaning
to shake or tremble, often due to fear or a natural event like an earthquake
Example
The ground began to quake during the earthquake.
El suelo comenzó a temblar durante el terremoto.
B1 adjective /ˈkwɑː.lɪ.faɪd/

Qualified

calificado; cualificado
Meaning
having the necessary skills, knowledge, or experience for a particular job or activity; certified
Example
She is a qualified doctor with years of experience.
Ella es una doctora calificada con años de experiencia.
C2 noun /ˈkwɔːrtoʊ/

quarto

libro de tamaño cuarto
Meaning
A book size resulting from folding each printed sheet into four leaves (eight pages).
Example
The library has rare Shakespeare quartos.
La biblioteca tiene raros cuartos de Shakespeare.
C1 adjective /kweɪnt/

quaint

antiguo y pintoresco
Meaning
attractively unusual or old-fashioned
Example
They stayed in a quaint little cottage by the sea.
Ellos se alojaron en una cabaña pintoresca junto al mar.
C1 adjective ˈkwɒn.tɪ.faɪ.ə.bəl

quantifiable

cuantificable
Meaning
Able to be expressed or measured as a quantity; capable of being counted or calculated.
Example
The impact of the project is quantifiable.
El impacto del proyecto es cuantificable.
B2 noun /kwest/

Quest

búsqueda; misión
Meaning
a journey or search for something; an adventure to achieve a goal
Example
The knight embarked on a quest to find the legendary treasure.
El caballero emprendió una búsqueda para encontrar el tesoro legendario.
C1 verb /ˈkwɪvər/

quiver

temblar
Meaning
To tremble or shake with slight but rapid motion.
Example
Her lips began to quiver as she tried not to cry.
Sus labios comenzaron a temblar mientras trataba de no llorar.
C1 adjective /ˈkwiːzi/

queasy

mareado
Meaning
Feeling sick to one's stomach; nauseated.
Example
She felt queasy after the long boat ride.
Ella se sintió mal después del largo paseo en bote.
B1 noun /ˈkwɔː.tər/

Quarter

cuarto
Meaning
one of four equal parts of something; a period of three months
Example
The company reported strong profits in the first quarter of the year.
La empresa informó fuertes ganancias en el primer cuarto del año.
C1 noun /kwɜːrk/

Quirk

peculiaridad; manía
Meaning
a peculiar behavioral habit; an unexpected turn or twist
Example
Her quirk of always wearing mismatched socks made her unique.
Su peculiaridad de siempre usar calcetines desparejos la hacía única.
C1 noun /kwoʊ/

quo

estado
Meaning
The existing state of affairs or situation, often used in the phrase 'status quo'.
Example
He wanted to maintain the status quo at work.
Quería mantener el estado actual en el trabajo.
C1 verb /kwɑːʃ/

quash

anular
Meaning
To reject or void something legally or to put an end to something forcefully.
Example
The court quashed the decision due to lack of evidence.
El tribunal anuló la decisión debido a la falta de pruebas.
C2 adjective /kwɪkˈsɑː.t̬ɪk/

quixotic

extremadamente idealista, irrealista e impráctico
Meaning
Extremely idealistic, unrealistic, and impractical.
Example
His quixotic dreams often led to disappointment.
Sus sueños quijotescos a menudo llevaban a la decepción.
C1 noun /kwɪnˈtɛsəns/

quintessence

la quintaesencia
Meaning
The purest or most perfect example of something.
Example
She is the quintessence of elegance.
Ella es la quintaesencia de la elegancia.
C1 noun /ˈkwɪk.sænd/

Quick-sand

arena movediza
Meaning
loose wet sand that yields easily to pressure and sucks in anything on its surface
Example
The explorer got trapped in quicksand while crossing the desert.
El explorador quedó atrapado en la arena movediza mientras cruzaba el desierto.
C2 adjective /ˈkwɒdreɪt/

quadrate

cuadrado
Meaning
square or nearly square; having four sides or being suited or corresponding to something
Example
The tiles had a neat quadrate shape that made the floor look orderly.
Las baldosas tenían una forma cuadrada ordenada que hacía que el piso se viera ordenado.
B1 noun /ˈkwɒn.tə.ti/

Quantity

cantidad; número; volumen
Meaning
an amount or number of something; the measurable property of something
Example
The quantity of water in the bottle is sufficient for the trip.
La cantidad de agua en la botella es suficiente para el viaje.