uncover
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B2 verb /ʌnˈkʌvə(r)/

uncover

Meaning
to reveal something that was hidden or secret
Example
The investigation uncovered new evidence.
C2 adjective /ʌnˈtiːtʃəbəl/

unteachable

Meaning
not able or willing to learn; resistant to instruction or guidance
Example
He was so stubborn that he became almost unteachable.
B2 adjective /ʌnəˈfreɪd/

unafraid

Meaning
Not feeling fear; brave or courageous
Example
She walked into the dark room, unafraid of what might be inside.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
A2 adjective /ˈjuːs.ləs/

Useless

Meaning
having no beneficial purpose; not useful
Example
This broken computer is completely useless.
C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

Meaning
Not recognized, admitted, or accepted; ignored or unnoticed
Example
Her contributions to the project went unacknowledged.
A1 preposition /ˈʌndər/

under

Meaning
in or to a lower position than something
Example
The cat is under the table.
C1 noun /ˈjuːnɪsən/

unison

Meaning
Simultaneous performance or utterance of action or speech.
Example
The choir sang in unison.
A1 interjection /ʌ/

uh

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.
A2 adjective /ʌnˈhæp.i/

Unhappy

Meaning
not happy; feeling sad or displeased; unfortunate or undesirable
Example
He was unhappy with the results of his exam.
C2 adjective /juːˈbɪkwɪtəs/

ubiquitious

Meaning
Present, appearing, or found everywhere.
Example
Smartphones have become ubiquitous in modern society.
A2 noun /ˌʌndərˈstændɪŋ/

understanding

Meaning
the ability to grasp the meaning, significance, or nature of something
Example
Her understanding of the issue was impressive.
C1 adjective /ʌnˈtaɪərɪŋ/

Untiring

Meaning
continuing without stopping; persistent; tireless
Example
Her untiring efforts finally led to success.
B2 adjective /ˌʌndɪˈveləpt/

Undeveloped

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

Unnecessarily

Meaning
to a greater extent than is needed; without necessity
Example
Don't worry unnecessarily about the exam.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
B1 adjective /ʌnˈkʊkt/

uncooked

Meaning
Not cooked; in a raw state.
Example
Eating uncooked meat can be dangerous.
B2 adjective /ˈʌt.ɚ/

Utter

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

Unmindful

Meaning
not paying attention; careless; heedless
Example
She was unmindful of the danger around her.
C1 noun /ʌpˈhiːvəl/

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.
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.
B1 verb /juˈnaɪt/

unite

Meaning
to join together or combine; to bring people or things together
Example
The crisis helped unite the community.
C1 adjective ʌnˈjiːl.dɪŋ

unyielding

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

unkindly

Meaning
in a cruel, harsh, or unsympathetic manner
Example
She spoke unkindly about her colleague during the meeting.
C1 adjective ʌnˈwɔːr.rən.tɪd

unwarranted

Meaning
Not justified or necessary; without good reason.
Example
His anger toward the staff was completely unwarranted.
B1 adjective /ʌnˈkaɪnd/

Unkind

Meaning
cruel; not nice or caring toward others
Example
It was unkind of him to make fun of her appearance.
B2 verb /ˌʌndərˈskɔːr/

underscore

Meaning
to emphasize or highlight something
Example
The incident underscored the need for better safety measures.
C1 verb /ʌnˈsɛtl/

unsettle

Meaning
To disturb or make someone feel anxious or uneasy.
Example
The sudden news unsettled the entire community.
B2 noun ˈjuːnəti

unity

Meaning
The state of being united or joined as a whole.
Example
Unity among people led to victory.
C2 verb /juˈzɜrp/

usurp

Meaning
to take someone's position of power illegally or by force
Example
The general tried to usurp the king's throne.
C2 verb /ˈʌndərˌmæn/

underman

Meaning
to supply with fewer workers or personnel than needed
Example
The hospital was undermanned during the flu outbreak.
C1 adjective /ˌʌnfɔːrˈsiːn/

unforeseen

Meaning
Not anticipated or predicted; unexpected.
Example
The project faced unforeseen challenges that delayed its completion.
C1 adjective /ʌnˈfɔːltərɪŋ/

unfaltering

Meaning
Steady and resolute; not weakening or hesitating
Example
She continued with unfaltering determination.
C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

Meaning
Not open to objection; acceptable and unobjectionable
Example
His behavior was unexceptionable throughout the event.
A2 noun /ˌʌpˈsteəz/

Upstairs

Meaning
on or to an upper floor of a building; the upper floor or floors
Example
She went upstairs to her bedroom to rest.
C1 noun /ˌʌnbɪˈliːf/

Unbelief

Meaning
lack of religious belief; skepticism or doubt
Example
His unbelief in the supernatural made him a skeptic.
B2 adjective /ʌnˈɪndʒərd/

uninjured

Meaning
Without injury; not physically harmed.
Example
All the passengers were rescued uninjured.
C2 adjective /ˈʌndjʊleɪtɪŋ/

undulating

Meaning
Having a smoothly rising and falling form or motion like waves.
Example
We drove through undulating hills.
C2 adjective /ˈʌndjʊləs/

undulous

Meaning
Having a wavy surface or form.
Example
The artist painted the undulous sea at sunset.
B1 adjective /ʌnˈlaɪk/

Unlike

Meaning
different from; not similar to
Example
Unlike his brother, he prefers quiet activities.
C2 noun /ˈʌndərlɪŋ/

underling

Meaning
a person of low rank or importance; a subordinate
Example
The manager ordered his underlings to finish the task quickly.
C1 adjective /ʌnˈdɔːntɪd/

Undaunted

Meaning
not intimidated or discouraged by difficulty, danger, or disappointment
Example
Despite the setbacks, she remained undaunted in pursuing her goals.
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.
B2 noun /ʌnˈkaɪndnəs/

unkindness

Meaning
lack of kindness; cruel or inconsiderate behavior
Example
His unkindness hurt her feelings deeply.
B2 adjective /ʌnˈfeɪ.vər.ə.bəl/

Unfavourable

Meaning
not helpful or advantageous; adverse
Example
The weather conditions were unfavourable for our outdoor event.
C1 verb /ˈʌndərkʌt/

undercut

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.
C2 adjective /ʌnˈtræməld/

untrammeled

Meaning
Not restricted or hampered; free and unrestricted.
Example
She enjoyed untrammeled freedom in her new life abroad.
C2 adjective /ʌnˈtɛmpərd/

untempered

Meaning
not moderated or softened; lacking proper balance or control
Example
The untempered anger of the crowd caused chaos.
A2 noun /ˈʌndərwɛr/

Under wear

Meaning
clothing worn under other clothes, next to the skin
Example
She bought new underwear from the department store.
C2 verb /ˌʌndərˈɡɜːrd/

undergird

Meaning
to provide support or foundation for; to strengthen
Example
Strong values undergird a healthy society.
C1 adverb /ˌʌnkənˈvɛnʃənəli/

unconventionally

Meaning
in a way that is not based on or conforming to accepted standards or norms
Example
She dresses unconventionally, mixing bold colors and patterns that surprise everyone.
B2 adjective /ʌnˈbaɪəst/

unbiased

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

ursine

Meaning
Relating to or resembling a bear.
Example
The man’s ursine strength amazed everyone.
B2 verb /ˌʌndərˈteɪk/

undertake

Meaning
to commit to and begin a task or project; to take on responsibility
Example
She decided to undertake a challenging project.
B2 adjective /ʌnˈwɪl.ɪŋ/

Unwilling

Meaning
not ready to do something; reluctant; not wanting to do
Example
He was unwilling to share his secret with anyone.
C2 adjective /ʌnˈfeɪnd/

unfeigned

Meaning
genuine; not pretended or insincere
Example
She expressed unfeigned joy at her friend's success.
B2 adjective /ˌʌnrɪˈlaɪəbl/

Unreliable

Meaning
not dependable; not able to be trusted or relied upon
Example
The old car is unreliable and breaks down frequently.
B2 adjective /ˌʌn.kəʊˈɒp.ər.ə.tɪv/

uncooperative

Meaning
not willing to help or work with others; unhelpful
Example
The witness was uncooperative and refused to answer questions.
B2 adjective /ʌnˈrɪəl/

unreal

Meaning
not real or not based on reality; exaggerated or imaginary
Example
The experience felt unreal after the sudden news.
C1 adjective /ˈʌpərˌmoʊst/

uppermost

Meaning
situated at the highest place or most important
Example
Her family's safety was uppermost in her mind during the crisis.
B1 adjective /ˈɜːrbən/

urban

Meaning
related to, characteristic of, or situated in a city or town
Example
Urban areas often have higher population density than rural areas.
C2 noun /ʌnˈkloʊðɪŋ/

unclothing

Meaning
the act or process of removing clothing
Example
The child quickly ran inside for unclothing after playing in the mud.
B2 noun /ʌnˈsɜːrtənti/

Uncertainty

Meaning
the state of being uncertain; doubt or lack of sureness
Example
The uncertainty about the weather delayed our trip.
C2 adjective /ʌnˈælɔɪd/

unalloyed

Meaning
Pure, complete, and not mixed with anything else.
Example
She felt unalloyed joy at the news of her success.
B2 adjective /ʌnˈdɪvaɪdɪd/

Undivided

Meaning
whole; complete; not separated or split
Example
The team showed undivided attention to the coach's instructions.
C1 verb /ʌnˈɜːθ/

unearth

Meaning
To dig up from the ground or to discover something hidden.
Example
Archaeologists unearthed ancient artifacts at the site.
C1 adjective /ˌʌnsəˈfɪstɪˌkeɪtɪd/

unsophisticated

Meaning
Lacking worldly experience, refinement, or complexity.
Example
The villagers led an unsophisticated but happy life.
B2 noun /ˌʌndəˈɡrædʒuət/

undergraduate

Meaning
a student who has not yet earned a bachelor's degree
Example
She is an undergraduate studying computer science.
A2 noun /ˈʌndərweər/

underwear

Meaning
Clothing worn beneath outer clothes, typically next to the skin.
Example
He bought new underwear for the trip.
C2 noun /ˈjuːʒəri/

usury

Meaning
The practice of lending money at unreasonably high interest rates.
Example
The law strictly prohibits usury.
A2 adjective /ʌnˈhel.θi/

Unhealthy

Meaning
harmful to health; not in good health; detrimental to well-being
Example
Eating too much fast food is unhealthy for your body.
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.
B1 adjective /ˌʌndərˈstændəbl/

understandable

Meaning
Able to be understood; reasonable or justifiable.
Example
Her reaction was understandable given the situation.
B2 verb /ˌʌndərˈɛstɪmeɪt/

underestimate

Meaning
To judge something as less important or smaller than it really is.
Example
Never underestimate the power of teamwork.
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.
B1 adjective /ʌnˈlaɪkli/

Unlikely

Meaning
not likely to happen; improbable
Example
It's unlikely to rain today with such clear skies.
B2 adjective /ʌnˈbæləns/

Unbalanced

Meaning
not balanced; lacking stability or equilibrium; mentally unstable
Example
The unbalanced table kept wobbling.
B2 adjective /ʌnˈbreɪkəbəl/

Unbreakable

Meaning
not able to be broken or damaged; very strong and durable
Example
Their friendship formed an unbreakable bond.
B2 verb /ɜːrdʒ/

urge

Meaning
to strongly encourage or try to persuade someone to do something
Example
Doctors urge patients to exercise regularly.
B2 noun /ʌnˈkɒnʃəsnəs/

unconsciousness

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.
C2 adjective /ˌʌn.təˈwɔːrd/

untoward

Meaning
Unexpected and inappropriate or inconvenient.
Example
The meeting ended without any untoward incidents.
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.
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.
C1 adjective /ʌnˈsəʊʃəbl/

unsociable

Meaning
not enjoying the company of others; avoiding social interaction
Example
He became unsociable after moving to a new city.
C1 verb /ˌʌndərˈvæljuː/

undervalue

Meaning
To assign too low a value or importance to something or someone.
Example
She felt that her boss consistently undervalued her contributions.
B2 adjective /ʌnˈɡreɪt.fəl/

Ungrateful

Meaning
not feeling or showing thanks for something done or given; not appreciating kindness
Example
She felt he was ungrateful for all the help she had given him.
C1 adjective /ʌnˈtoʊld/

Untold

Meaning
very great in amount or degree; countless; immeasurable
Example
The earthquake caused untold damage to the city.
C2 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

Meaning
absolute; not lessened or moderated
Example
The meeting was an unmitigated disaster.
C1 adjective ʌnˈskruːpjʊləs

unscrupulous

Meaning
Having or showing no moral principles; not honest or fair.
Example
Unscrupulous peers can lead adolescents to delinquency.
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.
A2 conjunction /ʌnˈlɛs/

unless

Meaning
except if
Example
We won't go unless it stops raining.
C1 adjective /ˌʌnbɪˈliːvɪŋ/

unbelieving

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.
C1 adjective /ʌlˈtɪəriər/

ulterior

Meaning
hidden or secret, often with a selfish motive
Example
He invited her with an ulterior motive.
C1 adjective /ʌnˈkwaɪ.ət/

Unquiet

Meaning
restless; unable to remain still or quiet; anxious or troubled
Example
She spent an unquiet night worrying about the exam results.
B2 adjective /ˈʌpˌraɪt/

Upright

Meaning
honest and morally correct; vertical or erect in position
Example
She is known for being an upright and honest businesswoman.
C1 adjective /ʌnˈbraɪdld/

unbridled

Meaning
Uncontrolled and unrestrained.
Example
The protesters showed unbridled enthusiasm for change.
B2 verb /ˈjuːtɪlaɪz/

utilize

Meaning
to make practical or effective use of something
Example
The company aims to utilize solar energy for production.
B2 adverb /ˈʌltəmətli/

ultimately

Meaning
in the end, after everything else
Example
Ultimately, we decided to go ahead with the project.
B2 adjective /ʌnˈkɒmən/

uncommon

Meaning
rare, unusual, or remarkable
Example
It is uncommon to see snow in this region.
B2 adverb juːˈnæn.ɪ.məs.li

unanimously

Meaning
With the agreement of all people involved; without opposition.
Example
The proposal was unanimously accepted.
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 /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 ˈʌp.raɪ.zɪŋ

uprising

Meaning
An act of resistance or rebellion; a revolt against an authority or government.
Example
The uprising marked the beginning of the revolution.
B1 adjective /ʌnˈmærid/

unmarried

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

Unwelcome

Meaning
not wanted or accepted; not invited or pleasant
Example
The unwelcome news ruined their vacation plans.
C1 adjective /ˌʌnˈɪntɪmeɪtɪŋ/

unintimating

Meaning
Not giving a hint or suggestion; not indicating.
Example
His unintimating tone gave no clue of his true feelings.
B2 verb ˈjuːnɪfaɪ

unify

Meaning
To make or become united, uniform, or whole; to bring together into a single unit.
Example
Adolescents unify with peers for social acceptance.
B2 adjective /ʌnˌkənˈfɜːmd/

Unconfirmed

Meaning
not confirmed as true or definite; not verified or substantiated
Example
The report remains unconfirmed until we receive official verification.
B2 noun /ˈʌndərˌteɪkɪŋ/

undertaking

Meaning
A task, project, or responsibility that someone agrees to do.
Example
Starting a new company is a difficult undertaking.
B2 adverb /ʌnˈdaʊtɪdli/

undoubtedly

Meaning
without a doubt, certainly
Example
He is undoubtedly the best player on the team.
C1 adjective /ʌnˈweɪ.vər.ɪŋ/

unwavering

Meaning
Steady or resolute; not wavering.
Example
He showed unwavering dedication to his goal.
B2 adjective /ʌnˈhɜːrt/

unhurt

Meaning
Not injured or harmed.
Example
She walked away from the accident unhurt.
C1 adjective /ʌnˈruːli/

Unruly

Meaning
difficult to control or manage; disorderly and disruptive
Example
The unruly crowd refused to follow the safety instructions.
C1 noun /ˈʌndərˌwɜːrld/

underworld

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.
C1 noun /ˈʌp.ʃɒt/

Upshot

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.
A1 adjective /ˈjuːs.fəl/

Useful

Meaning
having a beneficial purpose; practical
Example
This tool is very useful for fixing problems.
B2 adjective /ˌʌnəˈfɪʃ.əl/

Unofficial

Meaning
not officially authorized or confirmed; informal
Example
The unofficial results showed a close race.
C1 adjective /ˌʌndərˈhændɪd/

underhanded

Meaning
acting or done in a dishonest or secret way
Example
They exposed the company's underhanded dealings with its suppliers.
B2 adjective /ʌnhaɪˈdʒiːnɪk/

Unhygienic

Meaning
not clean; lacking proper sanitation
Example
The restaurant was closed due to unhygienic conditions in the kitchen.
B2 adjective /ˌʌndɪˈsaɪdɪd/

Undecided

Meaning
not having made a decision; uncertain
Example
She was undecided about which college to attend.
C1 adjective /ʌnˈwɪtɪŋ/

unwitting

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