underwear
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A2 noun /ˈʌndərweər/

underwear

ropa interior
Meaning
Clothing worn beneath outer clothes, typically next to the skin.
Example
He bought new underwear for the trip.
Compró ropa interior nueva para el viaje.
C1 adjective /ˌʌn.əˈdʌl.tə.reɪ.tɪd/

Unadulterated

puro
Meaning
not mixed or diluted with any different or extra elements; pure
Example
She felt unadulterated joy when she heard the news.
Sintió una alegría pura cuando escuchó la noticia.
C1 adjective /ʌnˈtʃælɪndʒd/

Unchallenged

incontestable; aceptado sin oposición; sin rival
Meaning
not disputed or questioned; accepted without opposition; having no rival
Example
He remained the unchallenged champion for five years.
Él permaneció como el campeón indiscutido durante cinco años.
C2 noun /ˈjuːnɪvəˌlɛns/

univalence

univalencia
Meaning
The state of having a single valence or combining power, especially in chemistry.
Example
Hydrogen is characterized by its univalence in chemical reactions.
El hidrógeno se caracteriza por su univalencia en las reacciones químicas.
B1 adjective /ˈɜːrdʒənt/

Urgent

urgente
Meaning
requiring immediate action or attention; pressing
Example
The patient needs urgent medical attention.
El paciente necesita atención médica urgente.
C1 adverb /ʌnˈnætʃrəli/

unnaturally

de manera antinatural
Meaning
in a way that is not natural or normal; excessively or strangely
Example
He smiled unnaturally, making everyone feel uncomfortable.
Sonrió de manera antinatural, haciendo que todos se sintieran incómodos.
B2 adjective /ˌʌndɪˈveləpt/

Undeveloped

no desarrollado; inmaduro; primitivo
Meaning
not yet developed; immature or primitive
Example
The undeveloped land was later turned into a park.
La tierra no desarrollada fue luego convertida en un parque.
C1 verb /ˌʌndərˈvæljuː/

undervalue

devaluar
Meaning
To assign too low a value or importance to something or someone.
Example
She felt that her boss consistently undervalued her contributions.
Ella sintió que su jefe constantemente no valoraba sus contribuciones.
B2 adjective /ˈjuː.nɪ.faɪd/

unified

unificado
Meaning
Made into a whole or joined together.
Example
A unified approach fosters better outcomes.
Un enfoque unificado fomenta mejores resultados.
B2 adverb /ʌnˈdaʊtɪdli/

undoubtedly

sin duda
Meaning
without a doubt, certainly
Example
He is undoubtedly the best player on the team.
Él es sin duda el mejor jugador del equipo.
B2 adverb /ʌnˈsɜːrtənli/

uncertainly

con incertidumbre
Meaning
in a way that shows doubt or lack of certainty
Example
She glanced uncertainly at the complicated instructions.
Ella miró las instrucciones complicadas con incertidumbre.
A2 adjective /ˈʌɡ.li/

Ugly

feo; repulsivo; desagradable
Meaning
unpleasant or repulsive in appearance; morally reprehensible
Example
The old building looked ugly after years of neglect.
El edificio viejo se veía feo después de años de descuido.
A2 adjective /ʌnˈtaɪdi/

Untidy

desordenado; desorganizado;
Meaning
not neat or orderly; messy and disorganized
Example
Her untidy room was filled with clothes scattered everywhere.
Su habitación desordenada estaba llena de ropa esparcida por todas partes.
B2 adjective /ˌʌnrɪˈzɒlvd/

unresolved

no resuelto
Meaning
not solved or settled; remaining undecided or unclear
Example
The dispute remains unresolved despite several meetings.
La disputa sigue sin resolverse a pesar de varias reuniones.
B1 noun /ʌnˈhæp.i.nəs/

unhappiness

infelicidad
Meaning
the state of being unhappy; sadness or dissatisfaction
Example
Her constant unhappiness affected everyone around her.
Su constante infelicidad afectaba a todos a su alrededor.
B1 verb /ˈʌpˌɡreɪd/

upgrade

actualizar
Meaning
to raise something to a higher standard, improve
Example
We decided to upgrade the software to the latest version.
Decidimos actualizar el software a la última versión.
C1 noun /ˌʌnbɪˈliːf/

Unbelief

incredulidad
Meaning
lack of religious belief; skepticism or doubt
Example
His unbelief in the supernatural made him a skeptic.
Su incredulidad hacia lo sobrenatural lo convirtió en un escéptico.
A1 verb /juːz/

use

utilizar
Meaning
to employ something for a purpose; to take advantage of
Example
I use my computer for work and entertainment.
Yo uso mi computadora para trabajar y entretenerme.
B2 adjective /ʌnˈwaɪz/

unwise

imprudente
Meaning
Showing poor judgment; not sensible or prudent.
Example
It would be unwise to invest all your money in one company.
Sería imprudente invertir todo tu dinero en una sola empresa.
B1 adjective /juːˈniːk/

Unique

único; singular; raro
Meaning
being the only one of its kind; unlike anything else
Example
Every snowflake is unique in its pattern.
Cada copo de nieve es único en su patrón.
B2 adjective /ʌnˈbaɪəst/

unbiased

imparcial
Meaning
Not showing prejudice; impartial and fair.
Example
The report gave an unbiased view of the situation.
El informe dio una vista imparcial de la situación.
B1 adjective /ʌnˈwel/

Unwell

enfermo; indispuesto
Meaning
not in good health; feeling sick or ill
Example
She has been feeling unwell since yesterday.
Ella ha estado sintiéndose mal desde ayer.
B1 adjective /ˈjuːnɪfɔːrm/

Uniform

uniforme
Meaning
consistent; identical; standardized
Example
All students must wear a uniform to school.
Todos los estudiantes deben usar un uniforme en la escuela.
C1 adjective /ʌnˈspiːkəbl/

unspeakable

inexpresable
Meaning
too bad or shocking to be expressed in words
Example
The survivors endured unspeakable horrors during the war.
Los sobrevivientes soportaron horrores inexpresables durante la guerra.
C2 noun /juːˌtɪlɪˈtɛəriənɪzəm/

utilitarianism

utilitarismo
Meaning
The ethical theory that actions are right if they are useful or for the benefit of the majority.
Example
Utilitarianism suggests that we should act to maximize overall happiness.
El utilitarismo sugiere que debemos actuar para maximizar la felicidad general.
C1 adjective /ʌnˈkleɪmd/

Unclaimed

no reclamado; no solicitado; abandonado o sin dueño
Meaning
not claimed by anyone; not demanded or requested; abandoned or ownerless
Example
The unclaimed luggage was stored in the airport's lost property department.
El equipaje no reclamado fue almacenado en el departamento de objetos perdidos del aeropuerto.
A1 interjection /ʌ/

uh

eh
Meaning
a sound people make when they hesitate or are unsure what to say next.
Example
Uh, I’m not sure if that’s the right answer.
Eh, no estoy seguro de si esa es la respuesta correcta.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

ininterrumpido
Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
Sus esfuerzos ininterrumpidos finalmente dieron fruto.
C1 verb /ʌnˈɜːθ/

unearth

desenterrar
Meaning
To dig up from the ground or to discover something hidden.
Example
Archaeologists unearthed ancient artifacts at the site.
Los arqueólogos desenterraron artefactos antiguos en el sitio.
B1 adjective /ʌnˈedjʊkeɪtɪd/

Uneducated

analfabeto; no educado
Meaning
lacking education; not having received formal schooling or training
Example
Many uneducated workers struggle to find well-paying jobs.
Muchos trabajadores analfabetos luchan por encontrar empleos bien remunerados.
C1 noun /juːˈtoʊpiə/

utopia

utopía
Meaning
An imagined perfect society or place where everything is ideal.
Example
Many philosophers dreamed of creating a utopia for humanity.
Muchos filósofos soñaron con crear una utopía para la humanidad.
B2 adjective /ʌnˈfeɪθ.fəl/

Unfaithful

infiel
Meaning
not loyal or true to a spouse, partner, or commitment
Example
He was unfaithful to his wife for many years.
Él fue infiel a su esposa durante muchos años.
B2 adjective /ʌnˈkɒmən/

uncommon

poco común
Meaning
rare, unusual, or remarkable
Example
It is uncommon to see snow in this region.
Es raro ver nieve en esta región.
C2 adjective /ɜːrˈbeɪn/

urbane

urbano
Meaning
showing polished manners, refinement, and sophistication
Example
He was an urbane gentleman who charmed everyone at the party.
Era un caballero urbano que encantó a todos en la fiesta.
C1 adjective /ʌnˈsəʊʃəl/

unsocial

antisocial
Meaning
not enjoying the company of others; avoiding social interaction; contrary to social norms
Example
He prefers unsocial hours so he can work alone without interruptions.
Prefiere horarios antisociales para trabajar solo.
B2 noun ˈjuːnəti

unity

unidad
Meaning
The state of being united or joined as a whole.
Example
Unity among people led to victory.
La unidad entre las personas llevó a la victoria.
B2 adjective /ʌnˌkənˈdɪʃ.ən.əl/

Unconditional

incondicional
Meaning
not subject to any conditions; complete and absolute
Example
She offered her unconditional support to her friend in need.
Ella ofreció su apoyo incondicional a su amigo en necesidad.
C1 noun /juːnəˈnɪməti/

Unanimity

unanimidad
Meaning
complete agreement among all members of a group
Example
The committee reached unanimity on the new policy.
El comité alcanzó la unanimidad sobre la nueva política.
A2 verb /ʌpˈdeɪt/

update

actualizar
Meaning
to make something more modern or current; to provide new information
Example
Please update your software regularly.
Por favor, actualice su software regularmente.
C1 adjective /ˌjuːnɪˈlætərəl/

Unilateral

unilateral
Meaning
one-sided; involving only one party
Example
The country made a unilateral decision to withdraw from the treaty.
El país tomó una decisión unilateral de retirarse del tratado.
C1 adjective /ʌlˈtɪəriər/

ulterior

motivo oculto
Meaning
hidden or secret, often with a selfish motive
Example
He invited her with an ulterior motive.
La invitó con un motivo oculto.
B2 noun /ˈɜː.dʒən.si/

Urgency

urgencia
Meaning
the quality of requiring immediate action or attention; pressing importance
Example
The urgency of the situation required immediate medical attention.
La urgencia de la situación requirió atención médica inmediata.
B1 adjective /ʌnˈlaɪkli/

Unlikely

improbable; poco probable
Meaning
not likely to happen; improbable
Example
It's unlikely to rain today with such clear skies.
Es poco probable que llueva hoy con cielos tan despejados.
C1 adjective /ˌʌnəˈdɔːrnd/

unadorned

sencillo, sin adornos
Meaning
Plain and simple; not decorated.
Example
The room was unadorned, with only a table and a chair.
La habitación estaba sencilla, con solo una mesa y una silla.
C1 noun /ʌnˈfeɪθfʊlnəs/

unfaithfulness

infidelidad
Meaning
the quality of being disloyal or not faithful; breach of trust or fidelity
Example
His unfaithfulness led to the end of their marriage.
Su infidelidad llevó al fin de su matrimonio.
A2 verb /ʌpˈset/

upset

molestar
Meaning
to make someone worried, sad, or angry; to disturb
Example
The bad news upset everyone.
La mala noticia upset a todos.
C1 adjective /ʌnˈtaɪərɪŋ/

Untiring

incansable; persistente; infatigable
Meaning
continuing without stopping; persistent; tireless
Example
Her untiring efforts finally led to success.
Sus esfuerzos incansables finalmente llevaron al éxito.
B2 adjective /ˌʌndɪˈsaɪdɪd/

Undecided

indeciso; incierto
Meaning
not having made a decision; uncertain
Example
She was undecided about which college to attend.
Ella estaba indecisa sobre qué universidad asistir.
C1 adjective ʌnɪnˈhæbɪtəbəl

uninhabitable

inhabitable
Meaning
Not suitable or safe for people to live in.
Example
Rapid urbanization can make cities uninhabitable.
La rápida urbanización puede hacer que las ciudades sean inhabitables.
C2 adjective /ʌnˈkɒnʃənəbl/

unconscionable

injustificable
Meaning
shockingly unfair or unreasonable
Example
The company made unconscionable profits from the crisis.
La empresa hizo ganancias injustificables durante la crisis.
C1 adjective /ʌnˈsiːmli/

unseemly

indecoroso
Meaning
Not proper or appropriate in behavior or appearance; unbecoming.
Example
His unseemly remarks embarrassed everyone at the dinner table.
Sus comentarios indecorosos avergonzaron a todos en la mesa de la cena.
B2 adjective /ʌnˈraɪp/

Unripe

inmaduro
Meaning
not fully developed or matured; not ready to be eaten
Example
The unripe bananas will turn yellow in a few days.
Las bananas no maduras se pondrán amarillas en unos días.
B2 adjective /ʌnˈdɪvaɪdɪd/

Undivided

Indiviso; completo; no separado ni dividido
Meaning
whole; complete; not separated or split
Example
The team showed undivided attention to the coach's instructions.
El equipo mostró atención indivisa a las instrucciones del entrenador.
C1 adjective ʌnˈjiːl.dɪŋ

unyielding

inquebrantable o firme
Meaning
Not easily broken or giving in to pressure.
Example
Her unyielding determination helped her overcome all challenges.
Su determinación inquebrantable la ayudó a superar todos los desafíos.
C1 adjective /ˌʌnəˈkaʊntəbl/

unaccountable

inexplicable
Meaning
Not able to be explained or justified.
Example
She felt an unaccountable fear as she entered the dark room.
Ella sintió un miedo inexplicable al entrar en la habitación oscura.
C2 adjective /ˌʌltrəˈmɒnteɪn/

ultramontane

partidario del Papa
Meaning
beyond the mountains, especially referring to support for the Pope over local church authority
Example
The debate highlighted the ultramontane position in church politics.
El debate destacó la posición ultramontana en la política eclesiástica.
C1 verb /ˈʌndərkʌt/

undercut

rebajar precios, debilitar
Meaning
to sell at a lower price than a competitor; to weaken or undermine something
Example
The company tried to undercut its rivals by offering lower prices.
La empresa intentó undercut a sus rivales ofreciendo precios más bajos.
B2 noun /ˈʌndərˌteɪkɪŋ/

undertaking

empresa
Meaning
A task, project, or responsibility that someone agrees to do.
Example
Starting a new company is a difficult undertaking.
Empezar una nueva empresa es una empresa difícil.
B1 adjective /ˈʌpˌkʌmɪŋ/

upcoming

próximo
Meaning
about to happen or appear
Example
The upcoming event will be held next week.
El próximo evento se llevará a cabo la próxima semana.
A2 noun /ʌmˈbrɛlə/

umbrella

paraguas
Meaning
A device used for protection against rain or sun, typically consisting of a collapsible canopy mounted on a central rod.
Example
She opened her umbrella as it started to rain.
Ella abrió su paraguas cuando empezó a llover.
B2 adjective /ˌʌnkənˈtroʊld/

uncontrolled

incontrolado
Meaning
not restrained or managed; lacking control
Example
The wildfire spread in an uncontrolled manner, causing widespread damage.
El incendio forestal se extendió de manera incontrolada, causando daños generalizados.
C2 adjective /ʌnˈspɛərɪŋ/

unsparing

implacable
Meaning
Showing no mercy or generosity; harsh or severe.
Example
The critic was unsparing in his review of the play.
El crítico fue implacable en su reseña de la obra.
C2 noun /ˈjuːʒəri/

usury

usura
Meaning
The practice of lending money at unreasonably high interest rates.
Example
The law strictly prohibits usury.
La ley prohíbe estrictamente la usura.
B2 verb /ɜːrdʒ/

urge

instar
Meaning
to strongly encourage or try to persuade someone to do something
Example
Doctors urge patients to exercise regularly.
Los doctores instan a los pacientes a hacer ejercicio regularmente.
C1 adjective ˌʌn.pəˈtɜːbd

unperturbed

no preocupado o perturbado por algo; calmado y compuesto
Meaning
Not worried or disturbed by something; calm and composed.
Example
She remained unperturbed despite the challenges.
Ella permaneció tranquila a pesar de los desafíos.
C1 adjective /ʌnˈwɪtɪŋ/

unwitting

inconsciente
Meaning
Not aware of what is happening; done without realizing.
Example
She became an unwitting participant in the scam.
Se convirtió en una participante inconsciente en la estafa.
B2 adjective /ʌnˈtʃeɪndʒəbəl/

Unchangeable

inmutable; fijo;
Meaning
not able to be changed or altered; fixed and permanent
Example
The laws of physics are unchangeable principles that govern the universe.
Las leyes de la física son principios inmutables que rigen el universo.
C1 adjective /ʌnˈbraɪdld/

unbridled

desenfrenado
Meaning
Uncontrolled and unrestrained.
Example
The protesters showed unbridled enthusiasm for change.
Los manifestantes mostraron entusiasmo desenfrenado por el cambio.
B1 adjective /ʌnˈʃʊr/

unsure

inseguro
Meaning
not certain or confident; feeling doubt
Example
She felt unsure about the decision.
Ella se sentía insegura sobre la decisión.
A2 adjective /ʌnˈhel.θi/

Unhealthy

insalubre; no saludable
Meaning
harmful to health; not in good health; detrimental to well-being
Example
Eating too much fast food is unhealthy for your body.
Comer demasiada comida rápida es insalubre para tu cuerpo.
B2 noun /ˈʌpˌkiːp/

up-keep

mantenimiento
Meaning
The process or cost of maintaining something in good condition.
Example
The upkeep of the old house is very expensive.
El mantenimiento de la casa antigua es muy caro.
B1 adjective /ʌnˈpɒpjʊlə/

unpopular

impopular
Meaning
not liked or supported by many people
Example
The decision was unpopular with the public.
La decisión fue impopular entre el público.
C1 noun /ˈjuːnɪsən/

unison

al unísono
Meaning
Simultaneous performance or utterance of action or speech.
Example
The choir sang in unison.
El coro cantó al unísono.
C1 adjective /ʌnˈkʌltʃəd/

Uncultured

incivilizado; sin educación
Meaning
lacking good manners, refinement, or education; uncivilized
Example
His uncultured behavior embarrassed everyone at the dinner party.
Su comportamiento incivilizado avergonzó a todos en la fiesta de la cena.
B1 adjective /ʌnˈmærid/

unmarried

soltero
Meaning
Not married; single.
Example
He is thirty-five and still unmarried.
Él tiene treinta y cinco años y sigue soltero.
B2 adjective /ˌʌnˈkɔːrdɪneɪtɪd/

uncoordinated

descoordinado
Meaning
lacking coordination, not well-organized or clumsy in movement
Example
His movements were uncoordinated, making him prone to accidents.
Sus movimientos eran descoordinados, lo que lo hacía propenso a accidentes.
B2 adverb /ʌnˈkɒnʃəsli/

unconsciously

inconscientemente
Meaning
without being aware of one's actions or surroundings
Example
She unconsciously tapped her foot to the rhythm of the music.
Ella inconscientemente movía el pie al ritmo de la música.
B1 adjective /ʌnˈkʊkt/

uncooked

crudo
Meaning
Not cooked; in a raw state.
Example
Eating uncooked meat can be dangerous.
Comer carne cruda puede ser peligroso.
B2 verb /ˈjuːtɪlaɪz/

utilize

utilizar
Meaning
to make practical or effective use of something
Example
The company aims to utilize solar energy for production.
La compañía tiene como objetivo utilizar energía solar para la producción.
C1 verb /ʌnˈmɑːsk/

unmask

desenmascarar
Meaning
to remove a mask or covering; to reveal the true identity, nature, or intentions of someone or something
Example
The investigation helped unmask the real culprit behind the crime.
La investigación ayudó a desenmascarar al verdadero culpable del crimen.
B1 verb /ʌnˈræp/

unwrap

desenvolver
Meaning
remove wrapping or covering from something; reveal something gradually or clearly
Example
She carefully unwrapped the gift with excitement.
Ella desenvolvió el regalo con cuidado y emoción.
B1 adjective /ʌnˈplɛz.ənt/

Unpleasant

desagradable
Meaning
not giving or causing pleasure; disagreeable
Example
The medicine had an unpleasant taste.
El medicamento tenía un sabor desagradable.
A2 adjective /ʌnˈkʌmf.tə.bəl/

Uncomfortable

incómodo; incómoda
Meaning
causing or feeling slight pain or physical discomfort; making someone feel embarrassed, awkward, or anxious
Example
The chair was so uncomfortable that I couldn't sit in it for more than ten minutes.
La silla era tan incómoda que no pude sentarme en ella por más de diez minutos.
C2 noun/verb /ˈʌpˌkæst/

upcast

lanzar hacia arriba
Meaning
Verb: To cast or throw upward. Noun: Something thrown or directed upward.
Example
The fisherman upcast his net into the air.
El pescador lanzó su red al aire.
A1 adjective /ˈjuːs.fəl/

Useful

útil; práctico
Meaning
having a beneficial purpose; practical
Example
This tool is very useful for fixing problems.
Esta herramienta es muy útil para resolver problemas.
C1 adjective /ʌnˈsɜːrvɪsəbəl/

Unserviceable

inservible; defectuoso
Meaning
not in working order; unable to be used; defective
Example
The old computer became unserviceable after the system crash.
La computadora vieja se volvió inservible después del fallo del sistema.
B2 noun ˌɜːbənaɪˈzeɪʃən

urbanization

urbanización
Meaning
The process by which towns and cities are formed and become larger as more people begin living and working in central areas.
Example
Urbanization leads to more developed infrastructure.
La urbanización conduce a una infraestructura más desarrollada.
C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

sumamente cómico
Meaning
Extremely funny or noisy; causing loud laughter or commotion.
Example
The comedian's jokes were absolutely uproarious.
Los chistes del comediante fueron absolutamente sumamente cómicos.
C1 adjective /ʌnˈvaɪəbl/

unviable

inválido
Meaning
Not capable of working successfully; not feasible or practical.
Example
The project was deemed unviable due to high costs.
El proyecto fue considerado inviable debido a los altos costos.
A1 noun /ˈʌŋkəl/

uncle

tío
Meaning
the brother of one's father or mother
Example
My uncle is visiting us next week.
Mi tío nos visitará la próxima semana.
C1 adjective /ʌnˈdɔːntɪd/

Undaunted

Intrépido; valiente; inquebrantable;
Meaning
not intimidated or discouraged by difficulty, danger, or disappointment
Example
Despite the setbacks, she remained undaunted in pursuing her goals.
A pesar de los contratiempos, ella permaneció intrépida en la persecución de sus objetivos.
B2 verb /ˌʌndərˈɛstɪmeɪt/

underestimate

subestimar
Meaning
To judge something as less important or smaller than it really is.
Example
Never underestimate the power of teamwork.
Nunca subestimes el poder del trabajo en equipo.
B1 adjective /ʌnˈeɪ.bəl/

Unable

incapaz
Meaning
lacking the power, skill, or means to do something
Example
He was unable to attend the meeting.
Él no pudo asistir a la reunión.
C1 noun /ˌjuːnɪˈfɔːrməti/

Uniformity

uniformidad; consistencia; igualdad
Meaning
the quality of being uniform; consistency or sameness
Example
The uniformity of the design created a pleasing visual effect.
La uniformidad del diseño creó un efecto visual atractivo.
C1 adjective /ʌnˈfɔːltərɪŋ/

unfaltering

inquebrantable
Meaning
Steady and resolute; not weakening or hesitating
Example
She continued with unfaltering determination.
Ella continuó con una determinación inquebrantable.
C2 noun /juːˈkeɪs/

ukase

decreto
Meaning
An authoritative decree or order, especially one issued by a sovereign or government.
Example
The czar issued a ukase restricting the freedom of the press.
El zar emitió un decreto que restringía la libertad de prensa.
B1 adjective /ʌnˈkaɪnd/

Unkind

cruel; no amable
Meaning
cruel; not nice or caring toward others
Example
It was unkind of him to make fun of her appearance.
Fue cruel de su parte hacer burla de su apariencia.
C2 adjective /ʌnəˈpiːzd/

unappeased

insatisfecho
Meaning
Not satisfied or calmed; still feeling discontent or anger
Example
Despite the apology, she remained unappeased.
A pesar de la disculpa, ella permaneció insatisfecha.
A2 adjective /ˈjuːs.ləs/

Useless

inútil
Meaning
having no beneficial purpose; not useful
Example
This broken computer is completely useless.
Esta computadora rota está completamente inútil.
B2 adjective /ˌʌnəˈweər/

Unaware

inconsciente; ajeno; sin saber
Meaning
not knowing or realizing; having no knowledge of something
Example
She was completely unaware of the danger.
Ella estaba completamente inconsciente del peligro.
B2 adjective /ʌnˈhɜːd/

Unheard

no escuchado; desconocido
Meaning
not heard or listened to; not given a hearing; unknown or unfamiliar
Example
His complaints went unheard by the management.
Sus quejas pasaron desapercibidas por la gerencia.
C2 noun /ˈʌmbrɪdʒ/

umbrage

resentimiento, ofensa
Meaning
A feeling of resentment or offense.
Example
She took umbrage at his rude remark.
Ella se ofendió con su comentario grosero.
B1 adjective /ʌnˈseɪf/

Unsafe

inseguro; peligroso;
Meaning
involving or causing danger or risk; not protected from harm
Example
It is unsafe to walk alone in this neighborhood at night.
Es inseguro caminar solo en este vecindario por la noche.
C2 verb /juˈzɜrp/

usurp

usurpar
Meaning
to take someone's position of power illegally or by force
Example
The general tried to usurp the king's throne.
El general intentó usurpar el trono del rey.
B2 adjective /ʌnprəˈdʌk.tɪv/

Unproductive

improductivo; ineficaz
Meaning
not achieving much; not producing good results
Example
The meeting was unproductive and wasted everyone's time.
La reunión fue improductiva y desperdició el tiempo de todos.
B1 adjective /ʌnˈfeər/

Unfair

injusto; desleal;
Meaning
not right or just; treating people in a way that favors some over others
Example
It's unfair to blame her for something she didn't do.
Es injusto culparla por algo que no hizo.
C1 verb /ʌnˈkɔrk/

uncork

destapar
Meaning
To remove the cork from a bottle; to open a bottle, especially of wine
Example
He uncorked the wine and poured a glass for everyone.
Destapó el vino y sirvió un vaso para todos.
C1 adjective /ʌnˈsteɪtɪd/

unstated

no expresado
Meaning
not expressed directly in words; implied or left unsaid
Example
The contract included several unstated expectations.
El contrato incluía varias expectativas no expresadas.
B2 adjective /ˌʌnkənˈvɛnʃənl/

unconventional

no convencional
Meaning
not based on or conforming to what is generally done or believed
Example
Her unconventional approach to teaching inspired her students to think creatively.
Su enfoque de enseñanza no convencional inspiró a sus estudiantes a pensar creativamente.
B1 adjective /ʌnˈnesəseri/

Unnecessary

innecesario; innecesario
Meaning
not needed; not required; pointless
Example
The meeting was unnecessary since all decisions were already made.
La reunión fue innecesaria ya que todas las decisiones ya se habían tomado.
C1 adjective /juːˈbɪkwɪtəs/

ubiquitous

ubiquito
Meaning
Existing or being everywhere at the same time.
Example
Social media has become ubiquitous among young people.
Las redes sociales se han vuelto ubicuas entre los jóvenes.
B2 adjective /ʌnˈbæləns/

Unbalanced

desbalanceado; inestable
Meaning
not balanced; lacking stability or equilibrium; mentally unstable
Example
The unbalanced table kept wobbling.
La mesa desbalanceada seguía tambaleando.
C1 adjective /ʌnˈvɔɪst/

unvoiced

no expresado
Meaning
not expressed in speech; in phonetics, a sound produced without vocal cord vibration
Example
The student kept her opinion unvoiced during the meeting.
La estudiante mantuvo su opinión no expresada durante la reunión.
C1 adjective /ˌʌnbɪˈkʌmɪŋ/

unbecoming

inadecuado
Meaning
Not proper or appropriate for a person; unsuitable.
Example
His rude behavior was unbecoming of a leader.
Su comportamiento grosero era inadecuado para un líder.
B1 verb /ʌnˈlɒk/

unlock

desbloquear
Meaning
to open something that is locked; to make something accessible or available
Example
She used the key to unlock the door.
Usó la llave para desbloquear la puerta.
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.
B2 adjective /ʌnˈɪndʒərd/

uninjured

ileso
Meaning
Without injury; not physically harmed.
Example
All the passengers were rescued uninjured.
Todos los pasajeros fueron rescatados ilesos.
A2 noun /ˈjuːzər/

user

usuario
Meaning
a person who uses or operates something
Example
He is a frequent user of this app.
Él es un usuario frecuente de esta aplicación.
C1 verb /ʌnˈsɛtl/

unsettle

desconcertar
Meaning
To disturb or make someone feel anxious or uneasy.
Example
The sudden news unsettled the entire community.
La noticia repentina desconcertó a toda la comunidad.
C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

irreprochable
Meaning
Not open to objection; acceptable and unobjectionable
Example
His behavior was unexceptionable throughout the event.
Su comportamiento fue irreprochable durante el evento.
A2 noun /ˈʌndərwɛr/

Under wear

ropa interior
Meaning
clothing worn under other clothes, next to the skin
Example
She bought new underwear from the department store.
Ella compró nuevo ropa interior en la tienda departamental.