Unbalanced
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B2 adjective /ʌnˈbæləns/

Unbalanced

Meaning
not balanced; lacking stability or equilibrium; mentally unstable
Example
The unbalanced table kept wobbling.
C1 noun /ˌʌnprɪˈdɪktəˌbɪləti/

unpredictability

Meaning
The quality of being impossible to predict or anticipate.
Example
The unpredictability of the weather made the trip uncertain.
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.
B1 adjective /ˈʌpər/

upper

Meaning
higher in position or rank
Example
The upper floor of the building is under renovation.
B2 adjective /ʌn.rɪˈleɪ.tɪd/

Unrelated

Meaning
having no connection or relationship; not connected by family ties
Example
The two incidents were completely unrelated to each other.
B2 adjective /ʌnˈfeɪ.vər.ə.bəl/

Unfavourable

Meaning
not helpful or advantageous; adverse
Example
The weather conditions were unfavourable for our outdoor event.
B2 adverb /ʌnˈkaɪndli/

unkindly

Meaning
in a cruel, harsh, or unsympathetic manner
Example
She spoke unkindly about her colleague during the meeting.
C1 verb /ˌʌndərˈlaɪ/

underlie

Meaning
to be the hidden cause or basis of something
Example
Strong cultural traditions underlie the community's practices.
B1 adjective /ʌnˈwel/

Unwell

Meaning
not in good health; feeling sick or ill
Example
She has been feeling unwell since yesterday.
B1 noun /ˌʌnɪmˈplɔɪmənt/

Unemployment

Meaning
the state of being unemployed; lack of paid work
Example
The unemployment rate has increased significantly this year.
B1 adjective /ˌʌnsəkˈsesfl/

Unsuccessful

Meaning
not achieving desired aims or results; failing to accomplish a purpose
Example
His unsuccessful attempt to climb the mountain left him disappointed.
B1 adjective /ʌnˈseɪf/

Unsafe

Meaning
involving or causing danger or risk; not protected from harm
Example
It is unsafe to walk alone in this neighborhood at night.
B1 preposition, adverb, adjective /ˌʌndərˈniːθ/

underneath

Meaning
Located directly below or beneath something
Example
The keys were hidden underneath the pile of papers.
C2 adjective /ˌʌnsɛrəˈmoʊniəs/

unceremonious

Meaning
Done without formality or courtesy; abrupt or rude.
Example
He made an unceremonious exit from the party.
C2 noun /ˈʌm.brə/

Umbra

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.
C1 noun /ˈʌp.tɜːn/

upturn

Meaning
An improvement or upward trend in a situation, especially in business or economy.
Example
The company experienced an upturn in sales last quarter.
A1 noun /ˌjuːnɪˈvɜːrsɪti/

university

Meaning
an institution of higher education and research, which grants academic degrees
Example
She is studying law at the university.
C1 adjective /ʌlˈtɪəriər/

ulterior

Meaning
hidden or secret, often with a selfish motive
Example
He invited her with an ulterior motive.
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.
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 /ʌnprɪˈpɛrd/

Unprepared

Meaning
not ready or able to deal with something
Example
He was unprepared for the difficult exam.
A1 noun /ˈʌŋkəl/

uncle

Meaning
the brother of one's father or mother
Example
My uncle is visiting us next week.
B1 adjective /ˌʌndərˈstændəbl/

understandable

Meaning
Able to be understood; reasonable or justifiable.
Example
Her reaction was understandable given the situation.
C1 adjective /ʌnˈkæni/

uncanny

Meaning
Strange or mysterious, especially in an unsettling way.
Example
She has an uncanny ability to predict the future.
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.
B1 adjective /ʌnˈjuzd/

Unused

Meaning
not being used; not having been used before
Example
There are many unused rooms in this old mansion.
A2 conjunction /ʌnˈlɛs/

unless

Meaning
except if
Example
We won't go unless it stops raining.
A2 adjective /ˈʌɡ.li/

Ugly

Meaning
unpleasant or repulsive in appearance; morally reprehensible
Example
The old building looked ugly after years of neglect.
A1 adverb /ʌp/

up

Meaning
towards a higher position or level
Example
He climbed up the ladder quickly.
B2 noun /ʌnˈrest/

Unrest

Meaning
a state of dissatisfaction and disturbance; social or political disorder
Example
The economic crisis led to widespread social unrest.
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.
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.
C1 adjective /ˌjuːtɪlɪˈtɛəriən/

utilitarian

Meaning
Designed to be useful or practical rather than attractive; relating to the doctrine that actions are right if they are useful or for the benefit of a majority.
Example
The building had a simple utilitarian design.
C1 adjective /ʌnˈfɔːltərɪŋ/

unfaltering

Meaning
Steady and resolute; not weakening or hesitating
Example
She continued with unfaltering determination.
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.
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.
B1 adjective /ʌnˈplɛz.ənt/

Unpleasant

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

ulcer

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.
B2 noun ˌjuːtɪlaɪˈzeɪʃən

utilization

Meaning
The action of making practical and effective use of something.
Example
Increased plastic utilization calls for better waste management.
B2 adjective /ʌnˈsteɪbəl/

Unstable

Meaning
likely to change; not steady or secure; unsteady
Example
The unstable economy made people worried about their jobs.
C1 adjective /ˈʌndərhænd/

underhand

Meaning
done secretly and dishonestly; deceitful
Example
The politician was accused of using underhand tactics to win the election.
C2 noun /ˈʌp.wel.ɪŋ/

upwelling

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.
B2 adjective /ʌnˈtʃeɪndʒɪŋ/

unchanging

Meaning
remaining the same over time; not changing
Example
Her love for her family was unchanging throughout the years.
B2 adjective /ˌʌnəˈfɪʃ.əl/

Unofficial

Meaning
not officially authorized or confirmed; informal
Example
The unofficial results showed a close race.
B2 adjective ʌnˈprɛsɪˌdɛntɪd

unprecedented

Meaning
Never done or known before; without previous example.
Example
Unprecedented advancements in science changed human lives.
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.
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.
A2 noun /ˈjuːzər/

user

Meaning
a person who uses or operates something
Example
He is a frequent user of this app.
B1 adjective /ʌnˈwɒn.tɪd/

Unwanted

Meaning
not desired or welcome; not wanted
Example
He felt like an unwanted guest at the meeting.
B2 verb /ˌʌndərˈskɔːr/

underscore

Meaning
to emphasize or highlight something
Example
The incident underscored the need for better safety measures.
C2 adjective /ʌnˈfeɪnd/

unfeigned

Meaning
genuine; not pretended or insincere
Example
She expressed unfeigned joy at her friend's success.
C1 adjective /ˌʌnbɪˈkʌmɪŋ/

unbecoming

Meaning
Not proper or appropriate for a person; unsuitable.
Example
His rude behavior was unbecoming of a leader.
C2 noun /juːˈkeɪs/

ukase

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.
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.
C1 adjective /ʌnˈkʌltʃəd/

Uncultured

Meaning
lacking good manners, refinement, or education; uncivilized
Example
His uncultured behavior embarrassed everyone at the dinner party.
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.
C2 adjective /ʌkˈsɔːriəs/

uxorious

Meaning
excessively fond of or submissive to one's wife
Example
He was so uxorious that he agreed with everything his wife said.
B2 adjective /ˌʌnrɪˈzɒlvd/

unresolved

Meaning
not solved or settled; remaining undecided or unclear
Example
The dispute remains unresolved despite several meetings.
C1 noun /ˈjuːnɪsən/

unison

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

Unilateral

Meaning
one-sided; involving only one party
Example
The country made a unilateral decision to withdraw from the treaty.
C2 adjective /ˌʌnəˈʃʊəd/

unassured

Meaning
Lacking confidence or certainty.
Example
She gave an unassured answer during the interview.
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.
B2 adjective /ˌʌndɪˈstɜːrbd/

Undisturbed

Meaning
not interrupted or interfered with; calm and peaceful
Example
She slept undisturbed for eight hours.
C2 adjective ˌʌn.əˈseɪ.lə.bəl

unassailable

Meaning
Unable to be attacked, questioned, or defeated.
Example
An unassailable position ensures dominance.
C2 adjective /ˌʌltrəˈmɒnteɪn/

ultramontane

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.
C1 adjective /ʌnˈʃeɪkən/

Unshaken

Meaning
not disturbed or affected; firm and steady; unwavering
Example
Her faith remained unshaken despite all the challenges.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
B2 adjective /ʌnˈriːdəbl/

unreadable

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

unsavory

Meaning
Disagreeable, unpleasant, or morally offensive.
Example
The politician was linked to an unsavory scandal.
B1 adjective /ˌʌnɪmˈpɔːrtənt/

unimportant

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

Unchaste

Meaning
not celibate; having engaged in sexual relations; lacking moral purity
Example
The conservative society considered her behavior unchaste and improper.
A1 adjective /ˈjuːs.fəl/

Useful

Meaning
having a beneficial purpose; practical
Example
This tool is very useful for fixing problems.
C1 verb /ʌnˈroʊl/

unroll

Meaning
to open something that is rolled up; to spread out gradually
Example
She unrolled the map on the table to find the route.
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 /ˌʌnɪnˈhɪbɪtɪd/

uninhibited

Meaning
Not restrained or restricted; free in behavior or expression.
Example
She gave an uninhibited laugh at the joke.
B2 noun /ˌʌndəˈɡrædʒuət/

undergraduate

Meaning
a student who has not yet earned a bachelor's degree
Example
She is an undergraduate studying computer science.
C1 adjective /ʌnˈkuːθ/

uncouth

Meaning
Lacking good manners, refinement, or grace; awkward or rough.
Example
His uncouth behavior shocked the guests at the party.
B2 adjective /ʌnˈhɜːrt/

unhurt

Meaning
Not injured or harmed.
Example
She walked away from the accident unhurt.
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.
A1 preposition/conjunction /ʌnˈtɪl/

until

Meaning
up to the time of
Example
I will wait until you come back.
C1 verb /ʌnˈkɔrk/

uncork

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.
C2 noun /ˈʌmbrɪdʒ/

umbrage

Meaning
A feeling of resentment or offense.
Example
She took umbrage at his rude remark.
B2 adjective /ˈʌpˌhɪl/

Uphill

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

Unemployed

Meaning
without a job; not having paid work
Example
He has been unemployed for six months now.
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 adverb /ʌnˈɜːrɪŋli/

unerringly

Meaning
Without making any mistakes; always accurate
Example
The archer aimed unerringly at the target.
B1 adjective /juːˈniːk/

Unique

Meaning
being the only one of its kind; unlike anything else
Example
Every snowflake is unique in its pattern.
C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

Meaning
Extremely funny or noisy; causing loud laughter or commotion.
Example
The comedian's jokes were absolutely uproarious.
C1 verb /ʌnˈɜːθ/

unearth

Meaning
To dig up from the ground or to discover something hidden.
Example
Archaeologists unearthed ancient artifacts at the site.
C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

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

Unnoticed

Meaning
not seen or observed; ignored
Example
His hard work went unnoticed by his manager.
C2 adjective /ʌnˈɡeɪnli/

ungainly

Meaning
Awkward, clumsy, or lacking grace in movement or appearance.
Example
The tall boy moved in an ungainly manner.
C1 adjective /ˌʌnfɔːrθˈkʌmɪŋ/

unforthcoming

Meaning
Not willing to talk or provide information; uncooperative.
Example
The witness was unforthcoming about what he had seen.
C2 verb /ˈʌndərˌraɪt/

underwrite

Meaning
To guarantee financial support, especially by agreeing to cover losses or risks; in insurance, to assess and accept risks.
Example
The bank agreed to underwrite the company's new bond issue.
B2 noun /ʌnˈkaɪndnəs/

unkindness

Meaning
lack of kindness; cruel or inconsiderate behavior
Example
His unkindness hurt her feelings deeply.
B1 adjective /ˈɜːrdʒənt/

Urgent

Meaning
requiring immediate action or attention; pressing
Example
The patient needs urgent medical attention.
B1 adjective /ʌnˈkaɪnd/

Unkind

Meaning
cruel; not nice or caring toward others
Example
It was unkind of him to make fun of her appearance.
C2 adjective /juːˈʒʊəriəs/

usurious

Meaning
Charging excessively high interest rates on loans.
Example
The bank was accused of offering loans at usurious rates.
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.
B2 adjective /ʌnˈdɪvaɪdɪd/

Undivided

Meaning
whole; complete; not separated or split
Example
The team showed undivided attention to the coach's instructions.
B2 adjective /ʌnˈrɪəl/

unreal

Meaning
not real or not based on reality; exaggerated or imaginary
Example
The experience felt unreal after the sudden news.
B1 adjective /ʌnˈnoʊn/

Unknown

Meaning
not known or identified; unfamiliar
Example
The author of this letter remains unknown.
A1 pronoun /ʌs/

us

Meaning
used to refer to the speaker and one or more other people as the object of a verb or preposition
Example
She gave us a gift.
C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

Meaning
not in accordance with a political constitution; violating constitutional principles
Example
The court declared the new law unconstitutional.
C2 verb /ʌpˈbreɪd/

upbraid

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

Unprofessional

Meaning
not conforming to the standards expected in a particular profession
Example
His unprofessional behavior led to his dismissal from the company.
B1 adjective /ˌʌnɪkˈspektɪd/

Unexpected

Meaning
not expected or anticipated; surprising
Example
The unexpected news left everyone speechless.
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.
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.
B1 noun /ˈjuːnɪvɜːrs/

Universe

Meaning
all existing matter and space; the cosmos
Example
Scientists study the universe to understand its mysteries.
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.
B2 adverb /ˈɜːrdʒəntli/

urgently

Meaning
in a way that requires immediate attention or action
Example
The patient urgently needs medical attention.
B2 adverb /ʌnˈfɛərli/

unfairly

Meaning
In a manner that is not just, reasonable, or impartial
Example
He was treated unfairly by the committee.
B2 noun /ˈʌpˌkiːp/

up-keep

Meaning
The process or cost of maintaining something in good condition.
Example
The upkeep of the old house is very expensive.
C1 adjective /ʌnˈɜːrθli/

unearthly

Meaning
Strange or unnatural in a way that seems not of this world
Example
The forest was filled with an unearthly glow.
C2 adjective /ˌʌltrəˈmʌndeɪn/

ultramundane

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

unavailability

Meaning
The state of being not available or not accessible.
Example
The unavailability of the manager caused a delay in the project.
B2 adjective /ʌnˈfeɪv(ə)rəbəl/

unfavorable

Meaning
not beneficial or advantageous; showing disapproval or opposition
Example
The proposal received an unfavorable response from the committee.
B2 adjective /ʌnˈdʒʌst/

Unjust

Meaning
not fair or right; morally wrong
Example
The punishment was unjust for such a minor offense.
B1 adjective /ˌʌnˈɪntrəstɪŋ/

uninteresting

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