Unquiet
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C1 adjective /ʌnˈkwaɪ.ət/

Unquiet

inquieto; ansioso; perturbado
Meaning
restless; unable to remain still or quiet; anxious or troubled
Example
She spent an unquiet night worrying about the exam results.
Pasó una noche inquieta preocupada por los resultados del examen.
B2 adjective /ʌnˈiːvən/

Uneven

irregular; áspero
Meaning
not level or smooth; not regular or consistent
Example
The road was uneven and full of potholes.
La carretera estaba irregular y llena de baches.
C1 verb /ˌʌndərˈlaɪ/

underlie

subyacer
Meaning
to be the hidden cause or basis of something
Example
Strong cultural traditions underlie the community's practices.
Las fuertes tradiciones culturales subyacen a las prácticas de la comunidad.
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 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 /ˌʌnbɪˈliːvɪŋ/

unbelieving

incrédulo
Meaning
Not willing or able to believe; skeptical or doubtful
Example
She gave him an unbelieving look when he claimed to have met a celebrity.
Ella le dio una mirada incrédula cuando afirmó haber conocido a una celebridad.
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.
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.
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.
B2 adjective /ʌnˈstɛdi/

unsteady

inestable
Meaning
not firm or stable; likely to change or fail
Example
She felt unsteady on her feet after the long journey.
Se sentía inestable después del largo viaje.
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.
B2 noun /ʌnˈkɒnʃəsnəs/

unconsciousness

inconsciencia
Meaning
the state of being unaware of and unable to respond to one's surroundings
Example
After the accident, he was in a state of unconsciousness for several hours.
Después del accidente, él estuvo en estado de inconsciencia durante varias horas.
C2 verb /ʌnˈkloʊð/

unclothe

desvestir; quitar la ropa
Meaning
to remove clothing from someone or something
Example
The nurse helped unclothe the patient for the examination.
La enfermera ayudó a desvestir al paciente para el examen.
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.
C1 noun /ˈʌndərdɒɡ/

underdog

desvalido
Meaning
a competitor thought to have little chance of winning; a weaker party in a contest
Example
The underdog team surprised everyone by winning the championship.
El equipo desvalido sorprendió a todos al ganar el campeonato.
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.
B1 adjective /ʌnˈkaʊntəbəl/

Uncountable

incontable; innumerable
Meaning
too many to be counted; innumerable; infinite in quantity
Example
There are uncountable stars in the night sky.
Hay estrellas incontables en el cielo nocturno.
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 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.
C2 adjective /ˌʌnəˈʃʊəd/

unassured

inseguro
Meaning
Lacking confidence or certainty.
Example
She gave an unassured answer during the interview.
Ella dio una respuesta insegura durante la entrevista.
C2 adjective /ˌʌnprəˈpɪʃəs/

unpropitious

desfavorable
Meaning
Not giving or indicating a good chance of success; unfavorable.
Example
The team began their journey under unpropitious weather conditions.
El equipo comenzó su viaje bajo condiciones meteorológicas desfavorables.
C1 adjective ʌnˈskruːpjʊləs

unscrupulous

deshonesto
Meaning
Having or showing no moral principles; not honest or fair.
Example
Unscrupulous peers can lead adolescents to delinquency.
Los compañeros deshonestos pueden llevar a los adolescentes a la delincuencia.
B2 adjective /ʌnˈwel.kəm/

Unwelcome

desagradable; no deseado; indeseado
Meaning
not wanted or accepted; not invited or pleasant
Example
The unwelcome news ruined their vacation plans.
Las malas noticias arruinaron sus planes de vacaciones.
C1 adjective /ˌʌnfɔːrˈsiːn/

unforeseen

inesperado
Meaning
Not anticipated or predicted; unexpected.
Example
The project faced unforeseen challenges that delayed its completion.
El proyecto enfrentó desafíos imprevistos que retrasaron su finalización.
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.
C2 adjective /ʌnˈfeɪnd/

unfeigned

genuino
Meaning
genuine; not pretended or insincere
Example
She expressed unfeigned joy at her friend's success.
Ella expresó una alegría genuina por el éxito de su amiga.
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.
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.
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.
C1 adjective /ˌʌnfɔːrθˈkʌmɪŋ/

unforthcoming

reacio
Meaning
Not willing to talk or provide information; uncooperative.
Example
The witness was unforthcoming about what he had seen.
El testigo fue reacio a hablar sobre lo que había visto.
B2 verb /ʌnˈfəʊld/

unfold

desplegar o abrir
Meaning
to open or spread out something that was folded; to gradually reveal or develop
Example
She unfolded the letter carefully.
Ella desdobló la carta cuidadosamente.
B2 adjective /ʌnˈriːdəbl/

unreadable

ilegible
Meaning
not able to be read or understood clearly; illegible
Example
The doctor’s handwriting was completely unreadable.
La letra del médico era completamente ilegible.
A2 noun /ˌʌpˈsteəz/

Upstairs

piso superior
Meaning
on or to an upper floor of a building; the upper floor or floors
Example
She went upstairs to her bedroom to rest.
Ella subió al piso de arriba a su dormitorio para descansar.
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.
C2 adjective /ˈɜːrsaɪn/

ursine

osoide
Meaning
Relating to or resembling a bear.
Example
The man’s ursine strength amazed everyone.
La fuerza osoide del hombre sorprendió a todos.
C1 noun /ˈʌp.rɔːr/

Uproar

alboroto; ruido; disturbio
Meaning
a loud and emotional noise or disturbance; public outcry
Example
The announcement caused an uproar among the students.
El anuncio causó un alboroto entre los estudiantes.
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 noun ˌʌndərˈprɪvəlɪdʒd ɡruːps

underprivileged groups

grupos desfavorecidos
Meaning
Groups of people who lack basic necessities or advantages that are available to other members of society.
Example
Underprivileged groups benefit from social initiatives.
Los grupos desfavorecidos se benefician de las iniciativas sociales.
C2 adjective /ʌkˈsɔːriəs/

uxorious

excesivamente afectuoso con la esposa
Meaning
excessively fond of or submissive to one's wife
Example
He was so uxorious that he agreed with everything his wife said.
Él era tan uxorio que estuvo de acuerdo con todo lo que su esposa decía.
C1 noun /ˈʌndərˌɡɑːrmənt/

undergarment

ropa interior
Meaning
a piece of clothing worn under outer clothes, usually next to the skin
Example
He bought new undergarments for the wedding.
Compró ropa interior nueva para la boda.
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 /ʌnˈtru/

Untrue

falso; incorrecto
Meaning
not true; false; incorrect
Example
His statement about the incident was completely untrue.
Su declaración sobre el incidente fue completamente falsa.
C2 adjective /ʌnˈflɛdʒd/

unfledged

inexperto
Meaning
Inexperienced, immature, or not fully developed.
Example
The unfledged writer struggled to complete his first novel.
El escritor inexperto luchó por completar su primera novela.
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.
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.
C2 adjective /juːˈbɪkwɪtəs/

ubiquitious

ubicuo
Meaning
Present, appearing, or found everywhere.
Example
Smartphones have become ubiquitous in modern society.
Los teléfonos inteligentes se han vuelto ubicuos en la sociedad moderna.
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.
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 verb /ʌpˈhoʊld/

uphold

mantener
Meaning
to maintain or support a principle, law, or decision
Example
The judge promised to uphold justice at all costs.
El juez prometió mantener la justicia a toda costa.
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.
A1 noun /ˌjuːnɪˈvɜːrsɪti/

university

universidad
Meaning
an institution of higher education and research, which grants academic degrees
Example
She is studying law at the university.
Ella está estudiando derecho en la universidad.
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 /ʌnˈʃeɪkən/

Unshaken

inquebrantable; firme
Meaning
not disturbed or affected; firm and steady; unwavering
Example
Her faith remained unshaken despite all the challenges.
Su fe permaneció inquebrantable a pesar de todos los desafíos.
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.
C1 adjective /ʌnˈsəʊʃəbl/

unsociable

poco sociable
Meaning
not enjoying the company of others; avoiding social interaction
Example
He became unsociable after moving to a new city.
Se volvió poco sociable después de mudarse a una nueva ciudad.
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.
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.
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.
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.
A1 adverb /ˈjuː.ʒu.ə.li/

Usually

habitualmente; usualmente
Meaning
in most cases; generally; as a rule
Example
I usually wake up at 7 AM every morning.
Normalmente me despierto a las 7 AM cada mañana.
C2 verb /ʌnˈfɛtər/

unfetter

desatar
Meaning
to release from restraint or restriction; to free
Example
The new law will unfetter small businesses from excessive regulations.
La nueva ley liberará a las pequeñas empresas de regulaciones excesivas.
B2 adjective /ˌʌnprɪˈdɪktəbəl/

unpredictable

impredecible
Meaning
not able to be predicted; changing suddenly and unexpectedly
Example
The weather in this region is highly unpredictable.
El clima en esta región es muy impredecible.
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 /ʌnˈfɔːltərɪŋ/

unfaltering

inquebrantable
Meaning
Steady and resolute; not weakening or hesitating
Example
She continued with unfaltering determination.
Ella continuó con una determinación inquebrantable.
B1 adjective /ʌnˈfrɛndli/

unfriendly

antipático
Meaning
not kind or welcoming; hostile or cold in behavior or attitude
Example
The shop owner seemed unfriendly to new customers.
El dueño de la tienda parecía antipático con los nuevos clientes.
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.
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 preposition, adverb, adjective /ˌʌndərˈniːθ/

underneath

debajo, bajo
Meaning
Located directly below or beneath something
Example
The keys were hidden underneath the pile of papers.
Las llaves estaban escondidas debajo de la pila de papeles.
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.
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 /ʌnˈskɪld/

Unskilled

no cualificado; trabajador sin habilidades
Meaning
lacking technical training or ability; not requiring special skills
Example
Many unskilled workers are looking for training opportunities.
Muchos trabajadores no cualificados están buscando oportunidades de formación.
B1 adjective /ʌnˈjuzd/

Unused

sin usar; no utilizado
Meaning
not being used; not having been used before
Example
There are many unused rooms in this old mansion.
Hay muchas habitaciones sin usar en esta antigua mansión.
B2 adjective /ˌʌnɪˈmædʒənəbəl/

Unimaginable

inimaginable
Meaning
impossible to conceive; beyond imagination
Example
The scale of destruction was unimaginable until we saw it firsthand.
La escala de la destrucción era inimaginable hasta que lo vimos de primera mano.
C1 adjective ʌnˈwɔːr.rən.tɪd

unwarranted

innecesario
Meaning
Not justified or necessary; without good reason.
Example
His anger toward the staff was completely unwarranted.
Su enojo hacia el personal fue completamente innecesario.
C1 verb /ʌpˈruːt/

uproot

desarraigar
Meaning
To pull something out of the ground; to remove or displace completely.
Example
They uprooted the old tree from the garden.
Ellos desenterraron el viejo árbol del jardín.
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.
C1 adjective /ˌʌnɪmˈplɔɪəbəl/

unemployable

desempleable
Meaning
Not able to be employed; lacking the skills or qualities necessary for employment
Example
Due to his criminal record, he was considered unemployable in most companies.
Debido a su historial criminal, fue considerado desempleable en la mayoría de las empresas.
B2 adjective /ʌnˈfeɪv(ə)rəbəl/

unfavorable

desfavorable
Meaning
not beneficial or advantageous; showing disapproval or opposition
Example
The proposal received an unfavorable response from the committee.
La propuesta recibió una respuesta desfavorable del comité.
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.
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.
C2 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

completo
Meaning
absolute; not lessened or moderated
Example
The meeting was an unmitigated disaster.
La reunión fue un desastre completo.
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.
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.
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.
B2 adjective /ʌnˈiːzi/

Uneasy

inquieto; ansioso; incómodo
Meaning
worried; anxious; uncomfortable; restless
Example
She felt uneasy about walking alone at night.
Ella se sentía inquieta al caminar sola de noche.
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.
B2 adverb /ʌnˈnesəserəli/

Unnecessarily

innecesariamente
Meaning
to a greater extent than is needed; without necessity
Example
Don't worry unnecessarily about the exam.
No te preocupes innecesariamente por el examen.
C2 noun /ˈʌp.wel.ɪŋ/

upwelling

Fenómeno oceanográfico que implica el movimiento de agua densa, fría y rica en nutrientes hacia la superficie del océano.
Meaning
An oceanographic phenomenon that involves wind-driven motion of dense, cooler, and nutrient-rich water towards the ocean surface.
Example
Upwelling brings nutrients to the ocean surface.
El upwelling lleva nutrientes a la superficie del océano.
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.
B1 adjective /ˌʌnˈpeɪd/

Unpaid

no remunerado; sin pago
Meaning
not paid for; without payment or salary
Example
She worked as an unpaid intern for six months.
Trabajó como una pasante no remunerada durante seis meses.
B2 adjective /ʌnˈkwɒl.ɪ.faɪd/

Unqualified

incapacitado; no cualificado;
Meaning
not having the necessary skills or qualifications; complete or absolute
Example
He was unqualified for the engineering position due to lack of experience.
Él estaba sin cualificaciones para el puesto de ingeniería debido a la falta de experiencia.
B2 verb ˈjuːnɪfaɪ

unify

unificar
Meaning
To make or become united, uniform, or whole; to bring together into a single unit.
Example
Adolescents unify with peers for social acceptance.
Los adolescentes se unifican con sus compañeros para la aceptación social.
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.
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.
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.
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.
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 /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 adjective /ˌʌnrɪˈkwaɪtɪd/

unrequited

no correspondido
Meaning
Not returned or reciprocated, especially in the context of love or affection.
Example
He suffered from unrequited love for years.
Él sufrió de amor no correspondido durante años.
C2 noun /ɜːrˈbænɪti/

urbanity

urbanidad
Meaning
refined courtesy, elegance, and sophistication in manner
Example
Her urbanity made her popular among diplomats and leaders.
Su urbanidad la hizo popular entre diplomáticos y líderes.
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.
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 /ˌʌndərˈlaɪɪŋ/

underlying

subyacente
Meaning
basic or hidden but important; forming the foundation of something
Example
The underlying reason for the conflict was never addressed.
La razón subyacente para el conflicto nunca fue abordada.
B2 adverb /ˈʌltəmətli/

ultimately

finalmente
Meaning
in the end, after everything else
Example
Ultimately, we decided to go ahead with the project.
Finalmente, decidimos continuar con el proyecto.
B1 adjective /juːˈnaɪtɪd/

United

unido; en conjunto; de acuerdo
Meaning
joined together for a common purpose; in agreement
Example
The team was united in their goal to win.
El equipo estaba unido en su objetivo de ganar.
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.
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 /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.
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 /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.
B1 adverb /ˌʌpsaɪd ˈdaʊn/

Upside-down

al revés
Meaning
with the upper part at the bottom; in or into a reversed position
Example
The picture was hanging upside-down on the wall.
La foto estaba colgada al revés en la pared.
C2 adjective /ˌʌnəˈsweɪdʒd/

unassuaged

inquieto
Meaning
Not made less intense or relieved; unrelieved.
Example
His grief remained unassuaged despite the passage of time.
Su dolor permaneció inquieto a pesar del paso del tiempo.
C1 adjective /ˌʌnəbˈtruːsɪv/

unobtrusive

discreto
Meaning
not attracting attention; blending in without causing notice
Example
The security cameras are designed to be unobtrusive.
Las cámaras de seguridad están diseñadas para ser discretas.
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 verb /ʌnˈroʊl/

unroll

desenrollar
Meaning
to open something that is rolled up; to spread out gradually
Example
She unrolled the map on the table to find the route.
Ella desenrolló el mapa sobre la mesa para encontrar la ruta.
C1 noun /ˈʌndərˌwɜːrld/

underworld

submundo
Meaning
The criminal world of organized crime or the mythical world of the dead.
Example
The detective spent years studying the secrets of the underworld.
El detective pasó años estudiando los secretos del submundo.
B2 adjective /ˌʌndɪˈzaɪərəbl/

Undesirable

indeseable; perjudicial; desagradable
Meaning
not wanted or wished for; harmful or unpleasant
Example
The new policy had several undesirable consequences.
La nueva política tuvo varias consecuencias indeseables.
C2 adjective /ʌnˈtɛmpərd/

untempered

intempérate
Meaning
not moderated or softened; lacking proper balance or control
Example
The untempered anger of the crowd caused chaos.
La ira intempérate de la multitud causó caos.
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.
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 /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.