unconsciously
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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.
C2 noun /ɜːrˈbænɪti/

urbanity

Meaning
refined courtesy, elegance, and sophistication in manner
Example
Her urbanity made her popular among diplomats and leaders.
C1 adjective /ʌnˈbraɪdld/

unbridled

Meaning
Uncontrolled and unrestrained.
Example
The protesters showed unbridled enthusiasm for change.
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 adjective /ʌnˈfeɪθ.fəl/

Unfaithful

Meaning
not loyal or true to a spouse, partner, or commitment
Example
He was unfaithful to his wife for many years.
B2 adjective /ʌnˈhɜːd/

Unheard

Meaning
not heard or listened to; not given a hearing; unknown or unfamiliar
Example
His complaints went unheard by the management.
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.
B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

Meaning
not typical; strange; different from what is normal
Example
She wore an unusual dress to the party.
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.
C1 adjective ʌnˈmætʃt

unmatched

Meaning
Not equaled or rivaled by any other; without equal.
Example
The freedom fighters showed unmatched bravery.
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 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.
C2 adjective /juːˈbɪkwɪtəs/

ubiquitious

Meaning
Present, appearing, or found everywhere.
Example
Smartphones have become ubiquitous in modern society.
A1 adjective /juːzd/

used

Meaning
having already been used
Example
This is a used car.
C1 adjective /ʌnˈmaɪndfəl/

Unmindful

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

unkempt

Meaning
Having an untidy or disheveled appearance.
Example
He looked unkempt after sleeping outdoors all night.
B1 adjective /ʌnˈmærid/

unmarried

Meaning
Not married; single.
Example
He is thirty-five and still unmarried.
C1 adjective /ʌnˈθɪŋkɪŋ/

unthinking

Meaning
done without careful thought; automatic or thoughtless
Example
His unthinking remark hurt her feelings.
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 /ʌnˈhɛlpfəl/

unhelpful

Meaning
not providing help or support; making a situation harder rather than easier
Example
His unhelpful attitude slowed down the entire project.
B2 noun /ʌnəˈbɪləti/

unability

Meaning
the state of being unable to do something; incapacity
Example
His unability to solve the problem caused delays in the project.
B2 verb /ˈjuːtɪlaɪz/

utilize

Meaning
to make practical or effective use of something
Example
The company aims to utilize solar energy for production.
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 ʌnˈprɛsɪˌdɛntɪd

unprecedented

Meaning
Never done or known before; without previous example.
Example
Unprecedented advancements in science changed human lives.
C2 adjective /ˈɜːrsaɪn/

ursine

Meaning
Relating to or resembling a bear.
Example
The man’s ursine strength amazed everyone.
B2 adjective /ʌnˈwel.kəm/

Unwelcome

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

Unmanageable

Meaning
difficult or impossible to control or handle
Example
The large class became unmanageable without proper supervision.
B2 adjective /ʌnˈstɛdi/

unsteady

Meaning
not firm or stable; likely to change or fail
Example
She felt unsteady on her feet after the long journey.
C1 verb /ʌnˈsɛtl/

unsettle

Meaning
To disturb or make someone feel anxious or uneasy.
Example
The sudden news unsettled the entire community.
B1 verb /ʌnˈpæk/

unpack

Meaning
to remove items from a container; to explain or analyze something in detail
Example
After arriving home, she began to unpack her suitcase.
B2 adjective /ʌnfəˈmɪl.jər/

Unfamiliar

Meaning
not known or recognized; strange
Example
The city was unfamiliar to me since I had never been there before.
C2 verb /ʌpˈbreɪd/

upbraid

Meaning
To scold or criticize someone harshly.
Example
The teacher upbraided the student for being late again.
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.
B2 adjective /ʌnˈberəbəl/

Unbearable

Meaning
too painful, annoying, or unpleasant to tolerate; impossible to endure
Example
The heat in the desert was unbearable.
B2 adjective /ʌnprəˈdʌk.tɪv/

Unproductive

Meaning
not achieving much; not producing good results
Example
The meeting was unproductive and wasted everyone's time.
B1 adjective /juːˈnaɪtɪd/

United

Meaning
joined together for a common purpose; in agreement
Example
The team was united in their goal to win.
C1 adjective /ˌjuːnɪˈsɛljʊlər/

unicellular

Meaning
Consisting of a single cell.
Example
Amoebas are unicellular organisms.
B2 adjective /ˌʌndɪˈnaɪəbl/

Undeniable

Meaning
impossible to deny or dispute; clearly true
Example
The evidence of his guilt was undeniable.
C2 adjective /ˌʌn.rɪˈdʒɛn.ər.ət/

unregenerate

Meaning
Not reformed or showing no signs of change; stubbornly refusing to reform or repent.
Example
He remained an unregenerate opponent of progress.
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.
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 verb /ʌnˈfəʊld/

unfold

Meaning
to open or spread out something that was folded; to gradually reveal or develop
Example
She unfolded the letter carefully.
C1 noun /ˈjuːnɪsən/

unison

Meaning
Simultaneous performance or utterance of action or speech.
Example
The choir sang in unison.
B2 adjective /ˌʌnprɪˈdɪktəbəl/

unpredictable

Meaning
not able to be predicted; changing suddenly and unexpectedly
Example
The weather in this region is highly unpredictable.
C2 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

Meaning
absolute; not lessened or moderated
Example
The meeting was an unmitigated disaster.
B1 adjective /ˌʌnɪmˈpɔːrtənt/

unimportant

Meaning
not having much value, significance, or influence
Example
The detail seemed unimportant compared to the main issue.
C2 adjective /ʌnˈlɛtəd/

unlettered

Meaning
lacking education or the ability to read and write; illiterate
Example
The unlettered villagers relied on oral traditions to preserve their history.
B1 adjective /ʌnˈkaʊntəbəl/

Uncountable

Meaning
too many to be counted; innumerable; infinite in quantity
Example
There are uncountable stars in the night sky.
A2 verb /ʌpˈdeɪt/

update

Meaning
to make something more modern or current; to provide new information
Example
Please update your software regularly.
B1 adjective /ʌnˈedjʊkeɪtɪd/

Uneducated

Meaning
lacking education; not having received formal schooling or training
Example
Many uneducated workers struggle to find well-paying jobs.
C1 adjective /ʌnˈsɜːrvɪsəbəl/

Unserviceable

Meaning
not in working order; unable to be used; defective
Example
The old computer became unserviceable after the system crash.
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.
C2 noun /ˈʌŋɡwənt/

unguent

Meaning
A soothing or healing ointment applied to the skin.
Example
The doctor applied an unguent to heal the burn.
B2 adjective /ʌnˈendɪŋ/

Unending

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

understated

Meaning
Presented in a subtle and restrained way.
Example
She wore an elegant but understated dress.
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.
C2 verb /ʌpˈhiːv/

upheave

Meaning
to lift or raise something forcefully; to cause to rise suddenly
Example
The workers had to upheave the heavy stone to clear the path.
C1 adjective /ʌnˈsiːmli/

unseemly

Meaning
Not proper or appropriate in behavior or appearance; unbecoming.
Example
His unseemly remarks embarrassed everyone at the dinner table.
C1 adjective /ʌnˈfɛtərd/

unfettered

Meaning
not restricted or confined; free
Example
The artist enjoyed unfettered freedom of expression.
B1 adjective /ʌnˈpɒpjʊlə/

unpopular

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

Undisturbed

Meaning
not interrupted or interfered with; calm and peaceful
Example
She slept undisturbed for eight hours.
B2 adverb juːˈnæn.ɪ.məs.li

unanimously

Meaning
With the agreement of all people involved; without opposition.
Example
The proposal was unanimously accepted.
C1 adjective /ˌʌnəbˈtruːsɪv/

unobtrusive

Meaning
not attracting attention; blending in without causing notice
Example
The security cameras are designed to be unobtrusive.
C1 adjective /ʌnˈtaɪmli/

Untimely

Meaning
happening at an inappropriate or inconvenient time; premature
Example
His untimely death at the age of thirty shocked everyone.
A2 adjective /ˈʌɡ.li/

Ugly

Meaning
unpleasant or repulsive in appearance; morally reprehensible
Example
The old building looked ugly after years of neglect.
B1 adjective /ˌʌnˈpeɪd/

Unpaid

Meaning
not paid for; without payment or salary
Example
She worked as an unpaid intern for six months.
B1 adjective /ˌʌnɪkˈspektɪd/

Unexpected

Meaning
not expected or anticipated; surprising
Example
The unexpected news left everyone speechless.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
C2 adjective /ˌʌnəˈsweɪdʒd/

unassuaged

Meaning
Not made less intense or relieved; unrelieved.
Example
His grief remained unassuaged despite the passage of time.
B1 adjective /juːˈniːk/

Unique

Meaning
being the only one of its kind; unlike anything else
Example
Every snowflake is unique in its pattern.
A1 verb /ˌʌndərˈstænd/

understand

Meaning
to know the meaning of something; to comprehend
Example
Do you understand the instructions?
C1 adjective /ʌnˈseɪvəri/

unsavory

Meaning
Disagreeable, unpleasant, or morally offensive.
Example
The politician was linked to an unsavory scandal.
C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

Meaning
Extremely funny or noisy; causing loud laughter or commotion.
Example
The comedian's jokes were absolutely uproarious.
B1 preposition, adverb, adjective /ˌʌndərˈniːθ/

underneath

Meaning
Located directly below or beneath something
Example
The keys were hidden underneath the pile of papers.
B2 verb /ɜːrdʒ/

urge

Meaning
to strongly encourage or try to persuade someone to do something
Example
Doctors urge patients to exercise regularly.
C1 adjective /ʌnˈhoʊli/

Unholy

Meaning
wicked; sinful; profane
Example
The unholy alliance between the two companies caused public outrage.
B2 adjective /ˈjuː.nɪ.faɪd/

unified

Meaning
Made into a whole or joined together.
Example
A unified approach fosters better outcomes.
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 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.
B1 adjective /ʌnˈsɜːrtən/

Uncertain

Meaning
not able to be relied on; not known or definite; not having reliable knowledge
Example
I am uncertain about my future career plans.
C2 verb /ʌnˈfrɒk/

unfrock

Meaning
To remove a priest from his position or deprive someone of a rank.
Example
The corrupt priest was unfrocked after the investigation.
C2 noun /ˈʌn.dɚˌstɔː.ri/

understory

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.
C1 adjective /ˌʌndərɪkˈspoʊzd/

underexposed

Meaning
insufficiently exposed to light (in photography) or not given enough attention
Example
The photo was underexposed and looked too dark.
B2 adjective /ʌnˈhɜːrt/

unhurt

Meaning
Not injured or harmed.
Example
She walked away from the accident unhurt.
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.
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 /ʌnˈstɪntɪŋ/

unstinting

Meaning
given generously without holding back
Example
She received unstinting support from her family.
C1 adjective /ˌʌnfɔːrˈsiːn/

unforeseen

Meaning
Not anticipated or predicted; unexpected.
Example
The project faced unforeseen challenges that delayed its completion.
B1 adjective /ʌnˈkaɪnd/

Unkind

Meaning
cruel; not nice or caring toward others
Example
It was unkind of him to make fun of her appearance.
C1 adjective /ˌʌnəˈdɔːrnd/

unadorned

Meaning
Plain and simple; not decorated.
Example
The room was unadorned, with only a table and a chair.
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.
C1 verb /ʌnˈnɜːrv/

unnerve

Meaning
to make someone lose confidence, courage, or composure
Example
The hostile questions began to unnerve the witness.
C1 adjective /ˌʌnɪˈkwɪvəkəl/

unequivocal

Meaning
Leaving no doubt; clear and unambiguous
Example
She gave an unequivocal answer to the question.
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 verb /ˌʌndərˈlaɪ/

underlie

Meaning
to be the hidden cause or basis of something
Example
Strong cultural traditions underlie the community's practices.
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.
C1 verb /ˌʌndəˈreɪt/

underrate

Meaning
to fail to recognize the full value or importance of something or someone
Example
Many people underrate the benefits of regular exercise.
B1 adjective /ʌnˈnesəseri/

Unnecessary

Meaning
not needed; not required; pointless
Example
The meeting was unnecessary since all decisions were already made.
B1 adjective /ˌʌnbɪˈliːvəbəl/

Unbelievable

Meaning
impossible to believe; extremely surprising or remarkable
Example
The magician's performance was absolutely unbelievable.
B1 adjective /ʌnˈplɛz.ənt/

Unpleasant

Meaning
not giving or causing pleasure; disagreeable
Example
The medicine had an unpleasant taste.
C1 noun /ˈʌndərˌɡɑːrmənt/

undergarment

Meaning
a piece of clothing worn under outer clothes, usually next to the skin
Example
He bought new undergarments for the wedding.
B1 noun /ˈjuːnjən/

Union

Meaning
the action of joining or combining; a political unit formed from separate states
Example
The union of the two companies created a powerful corporation.
C2 noun /ˈjuːʒəri/

usury

Meaning
The practice of lending money at unreasonably high interest rates.
Example
The law strictly prohibits usury.
C2 verb /ˌʌn.dɪˈsiːv/

undeceive

Meaning
To free someone from a misconception or false belief.
Example
She tried to undeceive him about the false rumors.
C2 adjective /ʌnˈʌtərəbl/

unutterable

Meaning
Too great, intense, or awful to be expressed or described in words.
Example
She was filled with unutterable joy at the news of her success.
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 adverb /ʌnˈwɪlɪŋli/

unwillingly

Meaning
in a way that shows reluctance or lack of desire; not willingly
Example
She unwillingly agreed to attend the meeting.
C2 adjective /ˌʌnprəˈpɪʃəs/

unpropitious

Meaning
Not giving or indicating a good chance of success; unfavorable.
Example
The team began their journey under unpropitious weather conditions.
B2 adjective /ˈʌpˌhɪl/

Uphill

Meaning
difficult; requiring great effort; sloping upward
Example
Learning a new language can be an uphill battle.
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.
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.
B1 adjective /ˌʌnˈɪntrəstɪŋ/

uninteresting

Meaning
not holding attention or curiosity; boring
Example
The lecture was uninteresting and difficult to stay focused on.
C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

Meaning
To charge less than the correct or fair amount.
Example
The shopkeeper accidentally undercharged me for the groceries.
A1 adjective /ˈjuːs.fəl/

Useful

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

Unripe

Meaning
not fully developed or matured; not ready to be eaten
Example
The unripe bananas will turn yellow in a few days.
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 /ʌnˈtaɪərɪŋ/

Untiring

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

Undivided

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

usurp

Meaning
to take someone's position of power illegally or by force
Example
The general tried to usurp the king's throne.
C1 adjective /ˌʌndərˈsaɪzd/

undersized

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