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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.
C1 adjective /ˈʌpərˌmoʊst/

uppermost

más alto
Meaning
situated at the highest place or most important
Example
Her family's safety was uppermost in her mind during the crisis.
La seguridad de su familia era lo más importante en su mente durante la crisis.
B2 adjective /ʌnəˈfreɪd/

unafraid

sin miedo
Meaning
Not feeling fear; brave or courageous
Example
She walked into the dark room, unafraid of what might be inside.
Ella entró en la habitación oscura, sin miedo de lo que pudiera haber dentro.
B2 adjective /ʌnˈbiːtən/

Unbeaten

invicto; no derrotado
Meaning
not defeated; having never lost; undefeated
Example
The team remains unbeaten this season.
El equipo sigue invicto esta temporada.
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.
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.
C2 adjective /ʌnˈtʃeɪst/

Unchaste

inmoral; impuro;
Meaning
not celibate; having engaged in sexual relations; lacking moral purity
Example
The conservative society considered her behavior unchaste and improper.
La sociedad conservadora consideró su comportamiento inmoral e inapropiado.
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.
C1 adjective /ʌnˈsɪvəl/

Uncivil

grosero; descortés;
Meaning
not polite or courteous; rude and discourteous in behavior
Example
His uncivil remarks during the meeting offended everyone present.
Sus comentarios incivilizados durante la reunión ofendieron a todos los presentes.
C1 adjective ʌnˈtʃɑːtɪd

uncharted

inexplorado
Meaning
Not mapped or surveyed; unknown or unexplored.
Example
The mission aimed to explore uncharted areas of the planet.
La misión tenía como objetivo explorar áreas inexploradas del planeta.
C1 adjective /ʌnˈɡɑː.dɪd/

Unguarded

desprotegido, descuidado
Meaning
not protected or defended; careless about revealing private thoughts or information
Example
In an unguarded moment, she revealed her true feelings about the project.
En un momento sin protección, ella reveló sus verdaderos sentimientos sobre el proyecto.
C1 noun /ʌpˈhiːvəl/

upheaval

upheaval
Meaning
a violent or sudden change or disruption to something
Example
The company faced a major upheaval after the sudden resignation of its CEO.
La empresa enfrentó un gran desorden tras la repentina renuncia de su CEO.
B1 adjective /ˌʌndərˈstændəbl/

understandable

comprensible
Meaning
Able to be understood; reasonable or justifiable.
Example
Her reaction was understandable given the situation.
Su reacción fue comprensible dada la situación.
C1 noun /ˈʌp.ʃɒt/

Upshot

resultado; conclusión
Meaning
the final result or outcome of a series of events; conclusion
Example
The upshot of the meeting was a decision to postpone the project.
El resultado de la reunión fue una decisión de posponer el proyecto.
C2 verb /ʌnˈɑːrm/

unarm

desarmar
Meaning
to remove weapons from someone or to deprive of means of attack or defense
Example
The soldiers were ordered to unarm the prisoners.
Se ordenó a los soldados desarmar a los prisioneros.
C1 adjective /ʌnˈkɛmpt/

unkempt

desordenado
Meaning
Having an untidy or disheveled appearance.
Example
He looked unkempt after sleeping outdoors all night.
Se veía desordenado después de dormir al aire libre toda la noche.
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.
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.
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.
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.
C2 adjective /ʌnˈælɔɪd/

unalloyed

puro
Meaning
Pure, complete, and not mixed with anything else.
Example
She felt unalloyed joy at the news of her success.
Ella sintió una alegría pura al recibir la noticia de su éxito.
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 adjective /ʌnˈprɒf.ɪ.tə.bl̩/

Unprofitable

no rentable
Meaning
not yielding profit or gain; not producing financial benefit
Example
The unprofitable business was forced to close down after three years.
El negocio no rentable se vio obligado a cerrar después de tres años.
C2 verb /ʌnˈjoʊk/

unyoke

desenganchar
Meaning
To release from a yoke or to free from restraint or obligation.
Example
The farmer unyoked the oxen after a long day of work.
El agricultor desenganchó los bueyes después de un largo día de trabajo.
B2 verb /ˌʌndərˈmaɪn/

undermine

socavar
Meaning
to gradually weaken or damage something or someone
Example
Constant criticism can undermine a child's confidence.
La crítica constante puede socavar la confianza de un niño.
C1 adjective /ʌnˈsɪvəlaɪzd/

Uncivilized

incivilizado; salvaje;
Meaning
not developed in terms of civilization; lacking social organization and culture; barbarous
Example
The explorers encountered an uncivilized tribe deep in the Amazon rainforest.
Los exploradores encontraron una tribu incivilizada en lo profundo de la selva amazónica.
B2 adverb /ˈʌt.ə.li/

Utterly

totalmente; absolutamente; completamente
Meaning
completely; absolutely; totally
Example
The movie was utterly boring and I fell asleep.
La película era completamente aburrida y me quedé dormido.
C1 adjective /ʌnˈmaɪndfəl/

Unmindful

despreocupado; descuidado;
Meaning
not paying attention; careless; heedless
Example
She was unmindful of the danger around her.
Ella no prestaba atención al peligro a su alrededor.
B1 verb /ʌnˈpæk/

unpack

desempacar
Meaning
to remove items from a container; to explain or analyze something in detail
Example
After arriving home, she began to unpack her suitcase.
Después de llegar a casa, empezó a desempacar su maleta.
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.
C1 adjective /ˌʌnˈɪntɪmeɪtɪŋ/

unintimating

sin indicios
Meaning
Not giving a hint or suggestion; not indicating.
Example
His unintimating tone gave no clue of his true feelings.
Su tono sin indicios no dio ninguna pista sobre sus verdaderos sentimientos.
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.
B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

inusual; extraño;
Meaning
not typical; strange; different from what is normal
Example
She wore an unusual dress to the party.
Ella llevaba un vestido inusual a la fiesta.
B1 adjective /ʌnˈlaɪk/

Unlike

diferente; no similar
Meaning
different from; not similar to
Example
Unlike his brother, he prefers quiet activities.
A diferencia de su hermano, él prefiere actividades tranquilas.
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.
C1 adjective /ʌnˈtɛnəbl/

untenable

insostenible
Meaning
not able to be maintained or defended against attack or objection
Example
The politician resigned when his position became untenable.
El político renunció cuando su posición se volvió insostenible.
C2 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

completo
Meaning
absolute; not lessened or moderated
Example
The meeting was an unmitigated disaster.
La reunión fue un desastre completo.
C1 adjective /ʌnˈkɒm.prə.maɪ.zɪŋ/

Uncompromising

intransigente, inflexible
Meaning
unwilling to change one's views or to agree about something; showing an unwillingness to make concessions to others
Example
He was uncompromising in his demand for a full apology.
Él era intransigente en su demanda de una disculpa completa.
B2 adjective /ˌʌnəˈveɪləbəl/

unavailable

no disponible
Meaning
Not able to be obtained, reached, or used; not present or accessible.
Example
The manager was unavailable to take calls during the meeting.
El gerente no estaba disponible para atender llamadas durante la reunión.
A1 pronoun /ʌs/

us

nosotros
Meaning
used to refer to the speaker and one or more other people as the object of a verb or preposition
Example
She gave us a gift.
Ella nos dio un regalo.
A2 conjunction /ʌnˈlɛs/

unless

a menos que
Meaning
except if
Example
We won't go unless it stops raining.
No iremos a menos que deje de llover.
C2 adjective /ˈʌndjʊleɪtɪŋ/

undulating

ondulante
Meaning
Having a smoothly rising and falling form or motion like waves.
Example
We drove through undulating hills.
Condujimos por colinas onduladas.
B1 adjective /ʌnˈfɔːr.tʃən.ət/

Unfortunate

desafortunado; lamentable
Meaning
having bad luck; regrettable or unlucky
Example
It was unfortunate that the meeting was cancelled at the last minute.
Fue desafortunado que la reunión se cancelara en el último minuto.
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.
B1 noun /ˈjuːnjən/

Union

unión
Meaning
the action of joining or combining; a political unit formed from separate states
Example
The union of the two companies created a powerful corporation.
La unión de las dos empresas creó una poderosa corporación.
C2 adverb /ʌnˈɜːrɪŋli/

unerringly

sin cometer errores
Meaning
Without making any mistakes; always accurate
Example
The archer aimed unerringly at the target.
El arquero apuntó sin cometer errores al objetivo.
B2 adjective /ʌnˈiːkwəl/

Unequal

desigual; injusto;
Meaning
not the same in quantity, size, or value; not fair or just
Example
The distribution of wealth is unequal in many countries.
La distribución de la riqueza es desigual en muchos países.
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.
B2 adjective /ˌʌnɪnˈfɔːrmd/

uninformed

desinformado
Meaning
lacking knowledge or awareness about a particular subject; not educated or informed
Example
The decision was made by an uninformed committee.
La decisión fue tomada por un comité desinformado.
B1 adjective ʌnˈplænd

unplanned

no planificado
Meaning
Not planned or arranged in advance; happening spontaneously without preparation.
Example
Unplanned urbanization contributes to environmental issues.
La urbanización no planificada contribuye a problemas ambientales.
C1 adjective /ʌnˈtʌtʃəbəl/

Untouchable

intocable; más allá de la crítica o el ataque
Meaning
not able to be touched or affected; beyond criticism or attack
Example
The CEO seemed untouchable despite the scandal.
El CEO parecía intocable a pesar del escándalo.
C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

inconstitucional
Meaning
not in accordance with a political constitution; violating constitutional principles
Example
The court declared the new law unconstitutional.
El tribunal declaró que la nueva ley era inconstitucional.
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 /ʌnˈsteɪbəl/

Unstable

inestable
Meaning
likely to change; not steady or secure; unsteady
Example
The unstable economy made people worried about their jobs.
La economía inestable hizo que las personas se preocuparan por sus trabajos.
B2 adjective /ʌnprəˈfɛʃ.ən.əl/

Unprofessional

no profesional
Meaning
not conforming to the standards expected in a particular profession
Example
His unprofessional behavior led to his dismissal from the company.
Su comportamiento no profesional llevó a su despido de la empresa.
C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

cobrar menos
Meaning
To charge less than the correct or fair amount.
Example
The shopkeeper accidentally undercharged me for the groceries.
El tendero accidentalmente me cobró menos por las compras.
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.
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.
C1 adjective /ˌʌndərˈsaɪzd/

undersized

de tamaño pequeño
Meaning
Smaller than the usual or expected size.
Example
The undersized puppy struggled to keep up with its siblings.
El perrito de tamaño pequeño luchaba por mantenerse al día con sus hermanos.
B1 adjective /ʌnˈwɒn.tɪd/

Unwanted

no deseado
Meaning
not desired or welcome; not wanted
Example
He felt like an unwanted guest at the meeting.
Él se sintió como un invitado no deseado en la reunión.
C2 noun /ˌjuːnɪˈtɛəriən/

unitarian

unitario
Meaning
A person who believes that God exists as one entity rather than as a Trinity; a member of a religious denomination that emphasizes individual freedom of belief.
Example
The Unitarian church is known for its inclusive and open-minded approach.
La iglesia unitaria es conocida por su enfoque inclusivo y de mente abierta.
C1 adjective /ʌnˈhoʊli/

Unholy

impío; perverso; profano
Meaning
wicked; sinful; profane
Example
The unholy alliance between the two companies caused public outrage.
La alianza impía entre las dos compañías causó indignación pública.
C1 adjective /ʌnˈsaɪtli/

unsightly

desagradable
Meaning
Unpleasant to look at; ugly.
Example
The garbage pile created an unsightly view in the park.
El montón de basura creó una vista desagradable en el parque.
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.
C2 adjective /ˌʌnpriːpəˈzɛsɪŋ/

unprepossessing

poco atractivo
Meaning
not attractive or appealing in appearance
Example
Despite his unprepossessing looks, he was very kind and intelligent.
A pesar de sus poco atractivos rasgos, era muy amable e inteligente.
C1 adjective ʌnˈpær.ə.leld

Unparalleled

incomparable
Meaning
Having no equal; unmatched, peerless, and supreme in quality or achievement.
Example
The unparalleled beauty of the Taj Mahal amazes visitors.
La belleza incomparable del Taj Mahal asombra a los visitantes.
C2 verb /ʌpˈhiːv/

upheave

levantar
Meaning
to lift or raise something forcefully; to cause to rise suddenly
Example
The workers had to upheave the heavy stone to clear the path.
Los trabajadores tuvieron que levantar la piedra pesada para despejar el camino.
C1 verb /ˌʌndərˈsteɪt/

understate

minimizar
Meaning
To describe something as being less important or serious than it really is.
Example
He tends to understate his achievements.
Él tiende a restar importancia a sus logros.
B2 adjective /ˌʌndɪˈnaɪəbl/

Undeniable

indiscutible
Meaning
impossible to deny or dispute; clearly true
Example
The evidence of his guilt was undeniable.
La evidencia de su culpabilidad era indiscutible.
A1 adverb /ʌp/

up

arriba
Meaning
towards a higher position or level
Example
He climbed up the ladder quickly.
Él subió rápidamente la escalera.
A2 preposition /əˈpɒn/

upon

sobre
Meaning
on or immediately after
Example
Upon hearing the news, he rushed to the hospital.
Al escuchar la noticia, corrió al hospital.
B2 adjective /ʌnˈsiːn/

Unseen

invisible; no visto ni notado anteriormente
Meaning
not previously seen or noticed; invisible; hidden
Example
The unseen forces of nature can be very powerful.
Las fuerzas invisibles de la naturaleza pueden ser muy poderosas.
B1 adjective /ˌʌnsəkˈsesfl/

Unsuccessful

fallido; no logrado;
Meaning
not achieving desired aims or results; failing to accomplish a purpose
Example
His unsuccessful attempt to climb the mountain left him disappointed.
Su intento fallido de escalar la montaña lo dejó decepcionado.
B1 adverb /ʌnˈjuːʒuəli/

unusually

de manera inusual
Meaning
in a way that is not typical or expected; to an uncommon degree
Example
It was unusually cold for this time of year.
Hacía un frío inusual para esta época del año.
B2 adverb juːˈnæn.ɪ.məs.li

unanimously

unánimemente
Meaning
With the agreement of all people involved; without opposition.
Example
The proposal was unanimously accepted.
La propuesta fue aceptada unánimemente.
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 /ˌʌnprɪˈtɛnʃəs/

unpretentious

modesto
Meaning
modest; not attempting to impress others with appearance or importance
Example
She lives in an unpretentious home but is very happy.
Ella vive en una casa modesta pero es muy feliz.
C1 adjective /ʌnˈmɒdɪfaɪd/

unmodified

sin modificar
Meaning
not changed from its original form or state
Example
The data was used in its unmodified form for analysis.
Los datos se usaron en su forma sin modificar para el análisis.
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.
C2 noun /ˈʌm.brə/

Umbra

sombra completa, la región oscura del centro de una mancha solar
Meaning
the fully shaded inner region of a shadow cast by an opaque object; the dark center of a sunspot
Example
During the eclipse, we stood in the moon's umbra.
Durante el eclipse, nos paramos en la umbra de la luna.
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.
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 /juːˈnɪsənənt/

unisonant

armonioso
Meaning
Sounding together or in harmony.
Example
The unisonant voices created a powerful effect.
Las voces armoniosas crearon un efecto poderoso.
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.
B2 adjective /ʌnˈɪndʒərd/

uninjured

ileso
Meaning
Without injury; not physically harmed.
Example
All the passengers were rescued uninjured.
Todos los pasajeros fueron rescatados ilesos.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

ininterrumpido
Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
Sus esfuerzos ininterrumpidos finalmente dieron fruto.
C2 adjective /ˌʌn.rɪˈdʒɛn.ər.ət/

unregenerate

intransigente
Meaning
Not reformed or showing no signs of change; stubbornly refusing to reform or repent.
Example
He remained an unregenerate opponent of progress.
Siguió siendo un oponente intransigente del progreso.
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.
C1 noun /ˈʌp.raɪt.nəs/

Uprightness

rectitud; integridad
Meaning
the quality of being honest and morally correct; integrity
Example
His uprightness in business dealings earned him great respect.
Su rectitud en los negocios le ganó gran respeto.
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.
B2 adjective /ˌʌnrɪˈlaɪəbl/

Unreliable

no confiable; no se puede confiar ni depender de él
Meaning
not dependable; not able to be trusted or relied upon
Example
The old car is unreliable and breaks down frequently.
El coche viejo no es confiable y se descompone con frecuencia.
B2 adjective /ˌʌnkənˈvɪnsɪŋ/

Unconvincing

increíble
Meaning
failing to persuade or impress; not believable or credible
Example
His excuse for being late was completely unconvincing.
Su excusa por llegar tarde era completamente increíble.
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.
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.
C1 adjective /ʌnˈmænɪdʒəbəl/

Unmanageable

incontrolable; fuera de control
Meaning
difficult or impossible to control or handle
Example
The large class became unmanageable without proper supervision.
La gran clase se volvió incontrolable sin una supervisión adecuada.
C1 adjective + noun ʌnˈpresɪdentɪd ˈnɒlɪdʒ

unprecedented knowledge

conocimiento sin precedentes
Meaning
Information or understanding that has never been obtained or achieved before.
Example
Artemis will provide unprecedented knowledge about the solar system.
Artemis proporcionará un conocimiento sin precedentes sobre el sistema solar.
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.
B1 noun /ˈjuːnɪvɜːrs/

Universe

universo
Meaning
all existing matter and space; the cosmos
Example
Scientists study the universe to understand its mysteries.
Los científicos estudian el universo para entender sus misterios.
B2 adjective /ʌnˈriːzənəbəl/

unreasonable

irrazonable
Meaning
not guided by reason or fairness; excessive or extreme beyond what is acceptable
Example
The manager made an unreasonable demand that no one could realistically meet.
El gerente hizo una exigencia irrazonable.
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.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

imperdonable
Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
Su traición fue un delito imperdonable.
B2 adjective /ʌnhaɪˈdʒiːnɪk/

Unhygienic

insalubre; falta de higiene adecuada
Meaning
not clean; lacking proper sanitation
Example
The restaurant was closed due to unhygienic conditions in the kitchen.
El restaurante estaba cerrado debido a condiciones insalubres en la cocina.
B2 adverb /ʌnˈkaɪndli/

unkindly

cruelmente
Meaning
in a cruel, harsh, or unsympathetic manner
Example
She spoke unkindly about her colleague during the meeting.
Ella habló cruelmente de su colega durante la reunión.
A1 preposition /ˈʌndər/

under

debajo
Meaning
in or to a lower position than something
Example
The cat is under the table.
El gato está debajo de la mesa.
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.
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.
B2 adjective /ʌnˈlɔːfl/

Unlawful

ilegal; ilícito
Meaning
not authorized by law; illegal
Example
The court declared the search unlawful.
El tribunal declaró que la búsqueda era ilegal.
C1 adjective /ʌnˈskeɪðd/

unscathed

ileso
Meaning
Without suffering any injury, damage, or harm.
Example
She escaped from the accident unscathed.
Ella escapó del accidente ilesa.
C1 adjective /ʌnˈseɪvəri/

unsavory

desagradable
Meaning
Disagreeable, unpleasant, or morally offensive.
Example
The politician was linked to an unsavory scandal.
El político estaba vinculado a un escándalo desagradable.
C1 noun /ˌʌnriˈælɪti/

unreality

irrealidad
Meaning
the state or quality of being unreal; lack of reality or truth
Example
The dreamlike setting gave the story a sense of unreality.
El escenario onírico dio a la historia una sensación de irrealidad.
C1 adjective /ˌʌnəˈsjuːmɪŋ/

unassuming

modesto
Meaning
Not pretentious or arrogant; modest.
Example
Despite his success, he remained unassuming and humble.
A pesar de su éxito, siguió siendo modesto y humilde.
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 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 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.
B2 adverb /ʌnˈplɛzəntli/

unpleasantly

desagradablemente
Meaning
in a way that causes discomfort, annoyance, or displeasure; in an unfriendly or disagreeable manner
Example
The room was unpleasantly hot during the afternoon.
La habitación estaba desagradablemente caliente por la tarde.
C1 verb /ˌʌndərˈsɛl/

undersell

vender a un precio más bajo
Meaning
to sell something at a lower price than competitors or to downplay the value of something
Example
The shop undersold its rivals by offering huge discounts.
La tienda vendió a sus rivales a un precio más bajo ofreciendo grandes descuentos.
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.
C1 noun /ˌʌnprɪˈdɪktəˌbɪləti/

unpredictability

imprevisibilidad
Meaning
The quality of being impossible to predict or anticipate.
Example
The unpredictability of the weather made the trip uncertain.
La imprevisibilidad del clima hizo que el viaje fuera incierto.
B2 verb /ˌʌndərˈɡoʊ/

undergo

someterse
Meaning
to go through something, especially something unpleasant or difficult
Example
She had to undergo surgery to recover.
Tuvo que someterse a cirugía para recuperarse.
B2 noun /juːˈtɪl.ə.ti/

Utility

utilidad; beneficio; servicio público
Meaning
the state of being useful, profitable, or beneficial; a public service
Example
The utility of solar panels increases with rising electricity costs.
La utilidad de los paneles solares aumenta con el aumento de los costos de electricidad.
C1 adjective /ʌnˈkwes.tʃən.ə.bl̩/

Unquestionable

indiscutible; seguro
Meaning
not able to be disputed or doubted; certain and beyond doubt
Example
Her honesty and integrity are unquestionable qualities.
Su honestidad e integridad son cualidades indiscutibles.