Unfortunate
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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.
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 /ʌnˈberəbəl/

Unbearable

insostenible
Meaning
too painful, annoying, or unpleasant to tolerate; impossible to endure
Example
The heat in the desert was unbearable.
El calor en el desierto era insoportable.
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 /ʌnˈtaɪmli/

Untimely

precipitado
Meaning
happening at an inappropriate or inconvenient time; premature
Example
His untimely death at the age of thirty shocked everyone.
Su muerte precipitada a la edad de treinta años sorprendió a todos.
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.
C1 adjective /ʌnˈkæni/

uncanny

extraño
Meaning
Strange or mysterious, especially in an unsettling way.
Example
She has an uncanny ability to predict the future.
Ella tiene una extraña habilidad para predecir el futuro.
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.
B1 verb /juˈnaɪt/

unite

unir
Meaning
to join together or combine; to bring people or things together
Example
The crisis helped unite the community.
La crisis ayudó a unir a la comunidad.
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 adjective /ˌʌnəˈvɔɪdəbəl/

Unavoidable

Inevitable; que no se puede evitar; obligatorio
Meaning
cannot be avoided; certain to happen; inevitable
Example
The meeting is unavoidable, so we must attend.
La reunión es inevitable, así que debemos asistir.
C1 noun /ˌʌl.tɪˈmeɪ.təm/

Ultimatum

ultimátum
Meaning
a final demand or statement of terms, the rejection of which will result in retaliation
Example
The boss gave him an ultimatum: improve or be fired.
El jefe le dio un ultimátum: mejora o serás despedido.
C1 noun /ˈʌlsər/

ulcer

úlcera
Meaning
a sore on the skin or a mucous membrane that does not heal easily
Example
The doctor prescribed medicine to treat the stomach ulcer.
El médico recetó un medicamento para tratar la úlcera de estómago.
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.
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.
C2 noun /ˌjuːzɜːrˈpeɪʃən/

usurpation

usurpación
Meaning
The act of taking someone's power or property illegally or by force.
Example
The general's usurpation of the presidency led to political unrest.
La usurpación de la presidencia por el general condujo a disturbios políticos.
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.
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.
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 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.
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 adjective /ʌnˈɜːrθli/

unearthly

sobrenatural
Meaning
Strange or unnatural in a way that seems not of this world
Example
The forest was filled with an unearthly glow.
El bosque estaba lleno de un resplandor sobrenatural.
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.
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.
A2 noun /ˌʌndərˈstændɪŋ/

understanding

comprensión
Meaning
the ability to grasp the meaning, significance, or nature of something
Example
Her understanding of the issue was impressive.
Su comprensión del tema fue impresionante.
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.
B2 adjective /ˌjuːnɪˈvɜːrsəl/

Universal

universal
Meaning
applicable to all cases; existing everywhere
Example
Music is a universal language that everyone understands.
La música es un lenguaje universal que todos entienden.
B1 adjective /ˈɜːrbən/

urban

urbano
Meaning
related to, characteristic of, or situated in a city or town
Example
Urban areas often have higher population density than rural areas.
Las áreas urbanas suelen tener una mayor densidad de población que las áreas rurales.
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.
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.
C1 adjective /ʌnˈweɪ.vər.ɪŋ/

unwavering

inquebrantable
Meaning
Steady or resolute; not wavering.
Example
He showed unwavering dedication to his goal.
Él mostró una dedicación inquebrantable hacia su meta.
A2 adjective /ʌnˈlʌki/

Unlucky

desafortunado; de mala suerte
Meaning
having bad luck; unfortunate
Example
He was unlucky to miss the winning shot.
Él tuvo mala suerte al perder el tiro ganador.
C2 verb /ʌpˈbreɪd/

upbraid

reprender
Meaning
To scold or criticize someone harshly.
Example
The teacher upbraided the student for being late again.
El maestro reprendió al estudiante por llegar tarde otra vez.
C1 verb /ˌʌndəˈreɪt/

underrate

subestimar
Meaning
to fail to recognize the full value or importance of something or someone
Example
Many people underrate the benefits of regular exercise.
Muchas personas subestiman los beneficios del ejercicio regular.
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.
B2 adjective /ʌnˈkɒn.ʃəs/

Unconscious

inconsciente; desmayado
Meaning
not awake and aware of one's surroundings; done or existing without one realizing
Example
The patient was unconscious for several hours after the surgery.
El paciente estuvo inconsciente durante varias horas después de la cirugía.
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 verb /ˌʌndərˈteɪk/

undertake

emprender
Meaning
to commit to and begin a task or project; to take on responsibility
Example
She decided to undertake a challenging project.
Ella decidió emprender un proyecto desafiante.
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.
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.
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.
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 /ʌnˈɑːrmd/

unarmed

desarmado
Meaning
Not equipped with or carrying weapons
Example
The police found the suspect unarmed during the search.
La policía encontró al sospechoso desarmado durante la búsqueda.
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.
A2 noun /ˈjuːnɪt/

unit

unidad
Meaning
an individual thing or person regarded as a single and complete entity
Example
Each unit in the production line is carefully tested.
Cada unidad en la línea de producción se prueba cuidadosamente.
C2 verb /ʌnˈkaʊtʃ/

uncouch

sacar del sofá (uso raro)
Meaning
to remove from a couch or to release from being laid down (rare/archaic usage)
Example
The surgeon attempted to uncouch the cataract.
El cirujano intentó sacar la catarata.
B2 adjective /ʌnˈhɛlpfəl/

unhelpful

poco útil
Meaning
not providing help or support; making a situation harder rather than easier
Example
His unhelpful attitude slowed down the entire project.
Su actitud poco útil retrasó todo el proyecto.
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.
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.
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 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.
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.
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 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.
C1 verb /ʌnˈnɜːrv/

unnerve

perder la confianza
Meaning
to make someone lose confidence, courage, or composure
Example
The hostile questions began to unnerve the witness.
Las preguntas hostiles comenzaron a poner nervioso al testigo.
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.
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.
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 /ʌnˈruːli/

Unruly

desordenado; indisciplinado;
Meaning
difficult to control or manage; disorderly and disruptive
Example
The unruly crowd refused to follow the safety instructions.
La multitud indisciplinada se negó a seguir las instrucciones de seguridad.
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.
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.
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.
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 verb /ʌnˈrævəl/

unravel

desentrañar
Meaning
To undo twisted or knitted threads; to solve or explain something complicated.
Example
The detective worked hard to unravel the mystery.
El detective trabajó arduamente para desentrañar el misterio.
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.
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 /ʌnɪmˈplɔɪd/

Unemployed

desempleado
Meaning
without a job; not having paid work
Example
He has been unemployed for six months now.
Él ha estado desempleado durante seis meses.
C1 noun ˈʌp.raɪ.zɪŋ

uprising

levantamiento
Meaning
An act of resistance or rebellion; a revolt against an authority or government.
Example
The uprising marked the beginning of the revolution.
El levantamiento marcó el comienzo de la revolución.
C2 noun /ˈʌn.dɚˌstɔː.ri/

understory

vegetación inferior
Meaning
The layer of vegetation beneath the main canopy of a forest.
Example
The understory of a rainforest is home to small mammals and insects.
La vegetación inferior de un bosque tropical es hogar de pequeños mamíferos e insectos.
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.
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.
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.
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.
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.
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.
B2 noun /ˌʌndəˈɡrædʒuət/

undergraduate

estudiante de pregrado
Meaning
a student who has not yet earned a bachelor's degree
Example
She is an undergraduate studying computer science.
Ella es una estudiante de pregrado estudiando ciencias de la computación.
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.
C1 adjective /ʌnˈduː/

Undue

excesivo; inapropiado; más de lo necesario o adecuado
Meaning
excessive; inappropriate; more than is necessary or proper
Example
The teacher complained about undue pressure from parents.
El maestro se quejó de la presión excesiva de los padres.
B2 adjective /ʌnˈrɪəl/

unreal

irreal
Meaning
not real or not based on reality; exaggerated or imaginary
Example
The experience felt unreal after the sudden news.
La experiencia se sintió irreal después de la noticia repentina.
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.
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.
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 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.
C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

no reconocido
Meaning
Not recognized, admitted, or accepted; ignored or unnoticed
Example
Her contributions to the project went unacknowledged.
Sus contribuciones al proyecto pasaron desapercibidas.
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 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.
B2 noun /ˈʌndərkləʊðz/

underclothes

ropa interior
Meaning
Clothing worn beneath outer clothes, such as underwear or lingerie
Example
He folded his underclothes neatly before packing them.
Él dobló su ropa interior cuidadosamente antes de empacarla.
C2 adjective /ʌnˈlɛtəd/

unlettered

analfabeto
Meaning
lacking education or the ability to read and write; illiterate
Example
The unlettered villagers relied on oral traditions to preserve their history.
Los aldeanos analfabetos dependían de las tradiciones orales para preservar su historia.
C2 verb /ˌʌn.dɪˈsiːv/

undeceive

desengañar
Meaning
To free someone from a misconception or false belief.
Example
She tried to undeceive him about the false rumors.
Ella trató de desengañarlo sobre los rumores falsos.
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.
B2 adjective /ˌʌn.əkˈsep.tə.bəl/

Unacceptable

inaceptable
Meaning
not satisfactory or allowable; not acceptable
Example
The quality of work was completely unacceptable.
La calidad del trabajo era completamente inaceptable.
C2 noun /ˈjuːzjuːfrʌkt/

usufruct

usufructo
Meaning
The legal right to use and enjoy the benefits of someone else’s property without owning it.
Example
The tenant had the usufruct of the land but not its ownership.
El inquilino tenía el usufructo de la tierra pero no su propiedad.
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.
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.
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.
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 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 adjective /ˌʌndərɪkˈspoʊzd/

underexposed

poco expuesto, descuidado
Meaning
insufficiently exposed to light (in photography) or not given enough attention
Example
The photo was underexposed and looked too dark.
La foto estaba poco expuesta y se veía demasiado oscura.
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.
B1 adjective /ˌʌnɪmˈpɔːrtənt/

unimportant

sin importancia
Meaning
not having much value, significance, or influence
Example
The detail seemed unimportant compared to the main issue.
El detalle parecía sin importancia en comparación con el problema principal.
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.
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.
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.
C2 adjective /ˈʌndjʊləs/

undulous

ondulado
Meaning
Having a wavy surface or form.
Example
The artist painted the undulous sea at sunset.
El artista pintó el mar ondulado al atardecer.
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.
B2 noun /ʌnəˈbɪləti/

unability

incapacidad
Meaning
the state of being unable to do something; incapacity
Example
His unability to solve the problem caused delays in the project.
Su incapacidad para resolver el problema causó retrasos en el proyecto.
B1 adjective /ʌnˈsɜːrtən/

Uncertain

incierto
Meaning
not able to be relied on; not known or definite; not having reliable knowledge
Example
I am uncertain about my future career plans.
Estoy incierto sobre mis planes futuros de carrera.
C1 noun /ʌnkənˈsɜːrn/

Unconcern

desinterés
Meaning
lack of worry or interest; indifference
Example
She showed complete unconcern about the criticism.
Ella mostró completo desinterés por las críticas.
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.
C2 adjective /ʌnˈtræməld/

untrammeled

libertad ilimitada
Meaning
Not restricted or hampered; free and unrestricted.
Example
She enjoyed untrammeled freedom in her new life abroad.
Disfrutó de libertad ilimitada en su nueva vida en el extranjero.
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.
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.
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.
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.
B2 adjective /ʌnˈendɪŋ/

Unending

interminable
Meaning
continuing forever; without end
Example
The unending rain made the day feel gloomy.
La lluvia interminable hizo que el día se sintiera triste.
B2 adjective /ʌnˌkənˈfɜːmd/

Unconfirmed

no confirmado; no verificado;
Meaning
not confirmed as true or definite; not verified or substantiated
Example
The report remains unconfirmed until we receive official verification.
El informe sigue sin confirmar hasta que recibamos la verificación oficial.
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.
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.
A1 verb /ˌʌndərˈstænd/

understand

entender
Meaning
to know the meaning of something; to comprehend
Example
Do you understand the instructions?
¿Entiendes las instrucciones?
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.
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.