unsightly
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C1 adjective /ʌnˈsaɪtli/

unsightly

Meaning
Unpleasant to look at; ugly.
Example
The garbage pile created an unsightly view in the park.
B2 adjective /ˌʌndərˈlaɪɪŋ/

underlying

Meaning
basic or hidden but important; forming the foundation of something
Example
The underlying reason for the conflict was never addressed.
C1 noun /ˈʌndərˌteɪkər/

undertaker

Meaning
A person whose job is to prepare the dead for burial and arrange funerals.
Example
The undertaker prepared the body for the funeral service.
B2 adjective /ʌnˈtʃeɪndʒəbəl/

Unchangeable

Meaning
not able to be changed or altered; fixed and permanent
Example
The laws of physics are unchangeable principles that govern the universe.
C2 noun /ˈjuːʒəri/

usury

Meaning
The practice of lending money at unreasonably high interest rates.
Example
The law strictly prohibits usury.
A1 adjective /ˈjuːs.fəl/

Useful

Meaning
having a beneficial purpose; practical
Example
This tool is very useful for fixing problems.
B2 adverb /ʌnˈkaɪndli/

unkindly

Meaning
in a cruel, harsh, or unsympathetic manner
Example
She spoke unkindly about her colleague during the meeting.
C2 adjective /ˌʌnəˈsweɪdʒd/

unassuaged

Meaning
Not made less intense or relieved; unrelieved.
Example
His grief remained unassuaged despite the passage of time.
C2 noun /ˈʌmbrɪdʒ/

umbrage

Meaning
A feeling of resentment or offense.
Example
She took umbrage at his rude remark.
B2 noun /juːˈtɪl.ə.ti/

Utility

Meaning
the state of being useful, profitable, or beneficial; a public service
Example
The utility of solar panels increases with rising electricity costs.
B2 verb /ɜːrdʒ/

urge

Meaning
to strongly encourage or try to persuade someone to do something
Example
Doctors urge patients to exercise regularly.
B1 preposition, adverb, adjective /ˌʌndərˈniːθ/

underneath

Meaning
Located directly below or beneath something
Example
The keys were hidden underneath the pile of papers.
B1 noun /ˈjuːs.fəl.nəs/

Usefulness

Meaning
the quality of being useful; practical value or helpfulness
Example
The usefulness of this tool became apparent during the project.
C1 adjective /ʌnˈɒnəd/

unhonoured

Meaning
not respected or given the recognition that is deserved; treated without honor
Example
He felt unhonoured after his years of service were ignored.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
B2 adjective /ˌʌnɪnˈfɔːrmd/

uninformed

Meaning
lacking knowledge or awareness about a particular subject; not educated or informed
Example
The decision was made by an uninformed committee.
B2 adverb /ʌnˈkɒnʃəsli/

unconsciously

Meaning
without being aware of one's actions or surroundings
Example
She unconsciously tapped her foot to the rhythm of the music.
C1 adjective /ˌjuːnɪˈlætərəl/

Unilateral

Meaning
one-sided; involving only one party
Example
The country made a unilateral decision to withdraw from the treaty.
B2 adjective ʌnˈprɛsɪˌdɛntɪd

unprecedented

Meaning
Never done or known before; without previous example.
Example
Unprecedented advancements in science changed human lives.
B2 noun /ˌʌndəˈɡrædʒuət/

undergraduate

Meaning
a student who has not yet earned a bachelor's degree
Example
She is an undergraduate studying computer science.
C2 noun /juːˌtɪlɪˈtɛəriənɪzəm/

utilitarianism

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.
B2 adjective /ʌnˈriːzənəbəl/

unreasonable

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.
B2 adjective /ˌʌndɪˈsaɪdɪd/

Undecided

Meaning
not having made a decision; uncertain
Example
She was undecided about which college to attend.
B2 verb /ˌʌndərˈɛstɪmeɪt/

underestimate

Meaning
To judge something as less important or smaller than it really is.
Example
Never underestimate the power of teamwork.
B2 adjective /ʌnˈiːkwəl/

Unequal

Meaning
not the same in quantity, size, or value; not fair or just
Example
The distribution of wealth is unequal in many countries.
C1 adjective /ˌʌnəˈkaʊntəbl/

unaccountable

Meaning
Not able to be explained or justified.
Example
She felt an unaccountable fear as she entered the dark room.
B2 adjective /ʌnˈbaɪəst/

unbiased

Meaning
Not showing prejudice; impartial and fair.
Example
The report gave an unbiased view of the situation.
C2 adjective /ˌʌltrəˈmʌndeɪn/

ultramundane

Meaning
Relating to things beyond the physical world; supernatural or transcendental.
Example
Philosophers often discuss ultramundane realities beyond human perception.
B2 adjective /ʌnˈendɪŋ/

Unending

Meaning
continuing forever; without end
Example
The unending rain made the day feel gloomy.
C1 adjective ˌʌn.pəˈtɜːbd

unperturbed

Meaning
Not worried or disturbed by something; calm and composed.
Example
She remained unperturbed despite the challenges.
C1 adjective /ʌnˈɡɑː.dɪd/

Unguarded

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.
B2 adjective /ʌnˈberəbəl/

Unbearable

Meaning
too painful, annoying, or unpleasant to tolerate; impossible to endure
Example
The heat in the desert was unbearable.
C2 noun /ˈʌŋɡwənt/

unguent

Meaning
A soothing or healing ointment applied to the skin.
Example
The doctor applied an unguent to heal the burn.
B1 adjective /ʌnˈmærid/

unmarried

Meaning
Not married; single.
Example
He is thirty-five and still unmarried.
B2 adjective /ˈʌt.ɚ/

Utter

Meaning
complete; absolute; total
Example
The movie was an utter disaster at the box office.
C1 adverb /ʌnˈnætʃrəli/

unnaturally

Meaning
in a way that is not natural or normal; excessively or strangely
Example
He smiled unnaturally, making everyone feel uncomfortable.
C1 adjective /ʌnˈmænɪdʒəbəl/

Unmanageable

Meaning
difficult or impossible to control or handle
Example
The large class became unmanageable without proper supervision.
C2 adjective /ʌnˈflæpəbəl/

unflappable

Meaning
calm and composed, especially in difficult situations
Example
Despite the crisis, he remained unflappable and confident.
C2 adjective /ʌnˈtɛmpərd/

untempered

Meaning
not moderated or softened; lacking proper balance or control
Example
The untempered anger of the crowd caused chaos.
B1 adjective /ˈɜːrdʒənt/

Urgent

Meaning
requiring immediate action or attention; pressing
Example
The patient needs urgent medical attention.
A2 adjective /ˈjuːs.ləs/

Useless

Meaning
having no beneficial purpose; not useful
Example
This broken computer is completely useless.
B2 verb /ʌnˈfəʊld/

unfold

Meaning
to open or spread out something that was folded; to gradually reveal or develop
Example
She unfolded the letter carefully.
B2 adjective /ˈʌpˌhɪl/

Uphill

Meaning
difficult; requiring great effort; sloping upward
Example
Learning a new language can be an uphill battle.
C2 adjective /ˌʌnpriːpəˈzɛsɪŋ/

unprepossessing

Meaning
not attractive or appealing in appearance
Example
Despite his unprepossessing looks, he was very kind and intelligent.
C2 noun /ˌjuːzɜːrˈpeɪʃən/

usurpation

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.
B2 verb /ʌnˈveɪl/

unveil

Meaning
to reveal or disclose something, especially in a formal manner
Example
The company will unveil a new product next week.
C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

Meaning
not in accordance with a political constitution; violating constitutional principles
Example
The court declared the new law unconstitutional.
B1 adjective /ʌnˈfeər/

Unfair

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.
C1 adjective /ˌʌnɪˈkwɪvəkəl/

unequivocal

Meaning
Leaving no doubt; clear and unambiguous
Example
She gave an unequivocal answer to the question.
C1 adjective /ʌnˈvɔɪst/

unvoiced

Meaning
not expressed in speech; in phonetics, a sound produced without vocal cord vibration
Example
The student kept her opinion unvoiced during the meeting.
B2 adjective /ˌʌnˈnoʊ.tɪst/

Unnoticed

Meaning
not seen or observed; ignored
Example
His hard work went unnoticed by his manager.
B2 adjective /ˈʌt.moʊst/

Utmost

Meaning
greatest; most extreme; maximum possible
Example
She showed utmost care while handling the fragile items.
A2 adjective /ʌnˈlʌki/

Unlucky

Meaning
having bad luck; unfortunate
Example
He was unlucky to miss the winning shot.
B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

Meaning
not typical; strange; different from what is normal
Example
She wore an unusual dress to the party.
A2 noun /ʌmˈbrɛlə/

umbrella

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.
B1 noun /ˈjuːnɪvɜːrs/

Universe

Meaning
all existing matter and space; the cosmos
Example
Scientists study the universe to understand its mysteries.
C1 adjective /ʌnˈskeɪðd/

unscathed

Meaning
Without suffering any injury, damage, or harm.
Example
She escaped from the accident unscathed.
B2 verb /ˌʌndərˈɡoʊ/

undergo

Meaning
to go through something, especially something unpleasant or difficult
Example
She had to undergo surgery to recover.
C1 adjective /ˌʌnfɔːrθˈkʌmɪŋ/

unforthcoming

Meaning
Not willing to talk or provide information; uncooperative.
Example
The witness was unforthcoming about what he had seen.
C1 adjective ʌnɪnˈhæbɪtəbəl

uninhabitable

Meaning
Not suitable or safe for people to live in.
Example
Rapid urbanization can make cities uninhabitable.
B2 verb /ʌpˈhoʊld/

uphold

Meaning
to maintain or support a principle, law, or decision
Example
The judge promised to uphold justice at all costs.
C2 adjective /juːˈʒʊəriəs/

usurious

Meaning
Charging excessively high interest rates on loans.
Example
The bank was accused of offering loans at usurious rates.
C1 verb /ʌnˈmɑːsk/

unmask

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.
C1 adjective ʌnˈjiːl.dɪŋ

unyielding

Meaning
Not easily broken or giving in to pressure.
Example
Her unyielding determination helped her overcome all challenges.
B2 adjective /ʌnˈθɪŋkəbl/

Unthinkable

Meaning
impossible to conceive or imagine; beyond belief or consideration
Example
It was unthinkable that such a tragedy could happen in our peaceful town.
C2 noun/verb /ˈʌpˌkæst/

upcast

Meaning
Verb: To cast or throw upward. Noun: Something thrown or directed upward.
Example
The fisherman upcast his net into the air.
C2 verb /ˈʌndjʊleɪt/

undulate

Meaning
To move with a smooth, wave-like motion.
Example
The snake undulated across the sand.
B2 adjective /ʌnˈkɒn.ʃəs/

Unconscious

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.
B1 noun /ʌnˈhæp.i.nəs/

unhappiness

Meaning
the state of being unhappy; sadness or dissatisfaction
Example
Her constant unhappiness affected everyone around her.
C1 verb /ʌnˈsɛtl/

unsettle

Meaning
To disturb or make someone feel anxious or uneasy.
Example
The sudden news unsettled the entire community.
C2 adjective /ʌnˈwiːldi/

unwieldy

Meaning
Difficult to carry or move because of its size, shape, or weight.
Example
The box was too unwieldy to carry up the stairs.
C2 adjective ˌʌn.əˈseɪ.lə.bəl

unassailable

Meaning
Unable to be attacked, questioned, or defeated.
Example
An unassailable position ensures dominance.
B1 adjective /ʌnˈedjʊkeɪtɪd/

Uneducated

Meaning
lacking education; not having received formal schooling or training
Example
Many uneducated workers struggle to find well-paying jobs.
B1 adverb /ˌʌpsaɪd ˈdaʊn/

Upside-down

Meaning
with the upper part at the bottom; in or into a reversed position
Example
The picture was hanging upside-down on the wall.
C2 adjective /ˌʌn.təˈwɔːrd/

untoward

Meaning
Unexpected and inappropriate or inconvenient.
Example
The meeting ended without any untoward incidents.
B2 adverb /ʌnˈsɜːrtənli/

uncertainly

Meaning
in a way that shows doubt or lack of certainty
Example
She glanced uncertainly at the complicated instructions.
C2 adjective /ʌnˈtræməld/

untrammeled

Meaning
Not restricted or hampered; free and unrestricted.
Example
She enjoyed untrammeled freedom in her new life abroad.
B2 adjective /ʌnˈsteɪbəl/

Unstable

Meaning
likely to change; not steady or secure; unsteady
Example
The unstable economy made people worried about their jobs.
B1 adjective /ʌnˈpɒpjʊlə/

unpopular

Meaning
not liked or supported by many people
Example
The decision was unpopular with the public.
B2 adjective /ˌʌndɪˈveləpt/

Undeveloped

Meaning
not yet developed; immature or primitive
Example
The undeveloped land was later turned into a park.
B2 adjective /ˌʌnˈkɔːrdɪneɪtɪd/

uncoordinated

Meaning
lacking coordination, not well-organized or clumsy in movement
Example
His movements were uncoordinated, making him prone to accidents.
C2 adjective /ʌnəˈpiːzd/

unappeased

Meaning
Not satisfied or calmed; still feeling discontent or anger
Example
Despite the apology, she remained unappeased.
C1 adjective /ˌʌndərˈsaɪzd/

undersized

Meaning
Smaller than the usual or expected size.
Example
The undersized puppy struggled to keep up with its siblings.
B2 adjective /ʌnprɪˈpɛrd/

Unprepared

Meaning
not ready or able to deal with something
Example
He was unprepared for the difficult exam.
B2 noun /ʌnˈsɜːrtənti/

Uncertainty

Meaning
the state of being uncertain; doubt or lack of sureness
Example
The uncertainty about the weather delayed our trip.
C1 noun /ʌnɪmˈpɔːrtəns/

unimportance

Meaning
the state or quality of being insignificant or not important
Example
He dismissed the issue with a sense of unimportance.
B2 noun /ʌnˈrest/

Unrest

Meaning
a state of dissatisfaction and disturbance; social or political disorder
Example
The economic crisis led to widespread social unrest.
B1 adjective /juːˈnaɪtɪd/

United

Meaning
joined together for a common purpose; in agreement
Example
The team was united in their goal to win.
B1 adverb /ʌnˈjuːʒuəli/

unusually

Meaning
in a way that is not typical or expected; to an uncommon degree
Example
It was unusually cold for this time of year.
B2 noun /ˈɜː.dʒən.si/

Urgency

Meaning
the quality of requiring immediate action or attention; pressing importance
Example
The urgency of the situation required immediate medical attention.
C1 adjective /ʌnˈwɪtɪŋ/

unwitting

Meaning
Not aware of what is happening; done without realizing.
Example
She became an unwitting participant in the scam.
B2 adjective /ʌnˈnætʃərəl/

Unnatural

Meaning
not existing in nature; artificial; forced
Example
The actor's smile looked unnatural and forced.
C1 noun /ˈʌndərdɒɡ/

underdog

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.
B1 adjective /ʌnˈfɔːr.tʃən.ət/

Unfortunate

Meaning
having bad luck; regrettable or unlucky
Example
It was unfortunate that the meeting was cancelled at the last minute.
C2 adjective /ˌʌnsɛrəˈmoʊniəs/

unceremonious

Meaning
Done without formality or courtesy; abrupt or rude.
Example
He made an unceremonious exit from the party.
C1 noun /ˌʌnriˈælɪti/

unreality

Meaning
the state or quality of being unreal; lack of reality or truth
Example
The dreamlike setting gave the story a sense of unreality.
B1 adjective /ʌnˈklɪər/

unclear

Meaning
not easy to understand; vague or ambiguous
Example
The instructions were unclear, so I asked for clarification.
B2 adjective /ʌnˈsiːn/

Unseen

Meaning
not previously seen or noticed; invisible; hidden
Example
The unseen forces of nature can be very powerful.
B2 adjective /ʌnˈriːdəbl/

unreadable

Meaning
not able to be read or understood clearly; illegible
Example
The doctor’s handwriting was completely unreadable.
C1 adjective /ʌnˈtoʊld/

Untold

Meaning
very great in amount or degree; countless; immeasurable
Example
The earthquake caused untold damage to the city.
B2 adjective /ˈʌl.tɪ.mət/

Ultimate

Meaning
being the best or most extreme example of its kind; final; last
Example
This is the ultimate test of your skills.
C1 adjective /ʌnˈkwes.tʃən.ə.bl̩/

Unquestionable

Meaning
not able to be disputed or doubted; certain and beyond doubt
Example
Her honesty and integrity are unquestionable qualities.
C1 verb /ˌʌndərˈsteɪt/

understate

Meaning
To describe something as being less important or serious than it really is.
Example
He tends to understate his achievements.
B1 adjective /ʌnˈfrɛndli/

unfriendly

Meaning
not kind or welcoming; hostile or cold in behavior or attitude
Example
The shop owner seemed unfriendly to new customers.
B2 adjective /ʌnˈfɪt/

Unfit

Meaning
not in good physical condition; unsuitable or inappropriate
Example
He was declared unfit for military service due to his poor health.
C2 verb /ʌnˈfɛtər/

unfetter

Meaning
to release from restraint or restriction; to free
Example
The new law will unfetter small businesses from excessive regulations.
B2 adjective /ʌnˈwɜːrði/

Unworthy

Meaning
not deserving respect or attention; lacking worth or merit
Example
He felt unworthy of such praise and recognition.
C1 noun /ˈjuːnɪsən/

unison

Meaning
Simultaneous performance or utterance of action or speech.
Example
The choir sang in unison.
C1 adjective /ˌʌndərˈsteɪtɪd/

understated

Meaning
Presented in a subtle and restrained way.
Example
She wore an elegant but understated dress.
B2 adjective /ˌʌnkənˈvɪnsɪŋ/

Unconvincing

Meaning
failing to persuade or impress; not believable or credible
Example
His excuse for being late was completely unconvincing.
C2 noun /ˌjuːnɪˈtɛəriən/

unitarian

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.
C2 noun /ˈɜːrtʃɪn/

urchin

Meaning
a mischievous or poorly dressed child, often from the streets
Example
The ragged urchins played by the riverbank.
C2 adjective /ʌnˈkɒnʃənəbl/

unconscionable

Meaning
shockingly unfair or unreasonable
Example
The company made unconscionable profits from the crisis.
C1 adjective /ʌnˈvaɪəbl/

unviable

Meaning
Not capable of working successfully; not feasible or practical.
Example
The project was deemed unviable due to high costs.
B2 adjective /ʌnˈskɪld/

Unskilled

Meaning
lacking technical training or ability; not requiring special skills
Example
Many unskilled workers are looking for training opportunities.
C1 verb /ʌnˈrævəl/

unravel

Meaning
To undo twisted or knitted threads; to solve or explain something complicated.
Example
The detective worked hard to unravel the mystery.
C1 adjective /ʌnˈmaɪndfəl/

Unmindful

Meaning
not paying attention; careless; heedless
Example
She was unmindful of the danger around her.
C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

Meaning
Not open to objection; acceptable and unobjectionable
Example
His behavior was unexceptionable throughout the event.
B2 adjective /ʌnˈɑːrmd/

unarmed

Meaning
Not equipped with or carrying weapons
Example
The police found the suspect unarmed during the search.
C1 adjective ʌnˈwɔːr.rən.tɪd

unwarranted

Meaning
Not justified or necessary; without good reason.
Example
His anger toward the staff was completely unwarranted.
C2 adjective /ʌnˈfeɪnd/

unfeigned

Meaning
genuine; not pretended or insincere
Example
She expressed unfeigned joy at her friend's success.