unfriendly
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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.
B1 adjective /ʌnˈedjʊkeɪtɪd/

Uneducated

Meaning
lacking education; not having received formal schooling or training
Example
Many uneducated workers struggle to find well-paying jobs.
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 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.
B2 adjective /ʌnˈwɜːrði/

Unworthy

Meaning
not deserving respect or attention; lacking worth or merit
Example
He felt unworthy of such praise and recognition.
B1 adjective /ʌnˈpɒpjʊlə/

unpopular

Meaning
not liked or supported by many people
Example
The decision was unpopular with the public.
C1 adjective /ʌnˈskeɪðd/

unscathed

Meaning
Without suffering any injury, damage, or harm.
Example
She escaped from the accident unscathed.
C1 adjective /ʌnˈtoʊld/

Untold

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

unclothe

Meaning
to remove clothing from someone or something
Example
The nurse helped unclothe the patient for the examination.
C1 noun /ˌʌl.tɪˈmeɪ.təm/

Ultimatum

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.
C1 adjective /ˌʌnəbˈtruːsɪv/

unobtrusive

Meaning
not attracting attention; blending in without causing notice
Example
The security cameras are designed to be unobtrusive.
C2 noun /ˈjuːʒəri/

usury

Meaning
The practice of lending money at unreasonably high interest rates.
Example
The law strictly prohibits usury.
B1 adjective /ˌʌnɪkˈspektɪd/

Unexpected

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

Urgent

Meaning
requiring immediate action or attention; pressing
Example
The patient needs urgent medical attention.
C2 adjective /ʌnˈælɔɪd/

unalloyed

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

Utmost

Meaning
greatest; most extreme; maximum possible
Example
She showed utmost care while handling the fragile items.
B2 adjective /ˌʌnɪˈmædʒənəbəl/

Unimaginable

Meaning
impossible to conceive; beyond imagination
Example
The scale of destruction was unimaginable until we saw it firsthand.
C1 adjective /ˌʌndərˈsteɪtɪd/

understated

Meaning
Presented in a subtle and restrained way.
Example
She wore an elegant but understated dress.
C1 adjective /ʌnˈspiːkəbl/

unspeakable

Meaning
too bad or shocking to be expressed in words
Example
The survivors endured unspeakable horrors during the war.
B2 adjective /ˌʌnˈnoʊ.tɪst/

Unnoticed

Meaning
not seen or observed; ignored
Example
His hard work went unnoticed by his manager.
A1 adverb /ˈjuː.ʒu.ə.li/

Usually

Meaning
in most cases; generally; as a rule
Example
I usually wake up at 7 AM every morning.
C2 adjective /ˌʌnrɪˈmɪtɪŋ/

unremitting

Meaning
Never relaxing or stopping; persistent.
Example
Her unremitting efforts finally paid off.
B1 noun /ʌnˈhæp.i.nəs/

unhappiness

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

unstated

Meaning
not expressed directly in words; implied or left unsaid
Example
The contract included several unstated expectations.
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 /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 /ˌʌndərˈsteɪt/

understate

Meaning
To describe something as being less important or serious than it really is.
Example
He tends to understate his achievements.
C1 noun /ˈʌp.raɪt.nəs/

Uprightness

Meaning
the quality of being honest and morally correct; integrity
Example
His uprightness in business dealings earned him great respect.
C1 noun ˌʌndərˈprɪvəlɪdʒd ɡruːps

underprivileged groups

Meaning
Groups of people who lack basic necessities or advantages that are available to other members of society.
Example
Underprivileged groups benefit from social initiatives.
C2 adjective /ˌʌnsɛrəˈmoʊniəs/

unceremonious

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

unthinking

Meaning
done without careful thought; automatic or thoughtless
Example
His unthinking remark hurt her feelings.
C1 adjective /ʌnˈtaɪmli/

Untimely

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

unarmed

Meaning
Not equipped with or carrying weapons
Example
The police found the suspect unarmed during the search.
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 noun /ˈjuː.sɪdʒ/

Usage

Meaning
the action of using something; the way in which words are used in a language
Example
The dictionary explains the correct usage of difficult words.
B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

Meaning
not typical; strange; different from what is normal
Example
She wore an unusual dress to the party.
B2 adjective /ˌʌnəˈweər/

Unaware

Meaning
not knowing or realizing; having no knowledge of something
Example
She was completely unaware of the danger.
A2 preposition /əˈpɒn/

upon

Meaning
on or immediately after
Example
Upon hearing the news, he rushed to the hospital.
C1 adjective /ˌʌnprɪˈtɛnʃəs/

unpretentious

Meaning
modest; not attempting to impress others with appearance or importance
Example
She lives in an unpretentious home but is very happy.
C1 adjective /ʌnˈsoʊld/

unsold

Meaning
not sold; remaining without a buyer
Example
The unsold goods were returned to the warehouse.
B1 verb /juˈnaɪt/

unite

Meaning
to join together or combine; to bring people or things together
Example
The crisis helped unite the community.
C1 verb /ˌʌndərˈlaɪ/

underlie

Meaning
to be the hidden cause or basis of something
Example
Strong cultural traditions underlie the community's practices.
B2 adverb /ʌnˈnesəserəli/

Unnecessarily

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

underling

Meaning
a person of low rank or importance; a subordinate
Example
The manager ordered his underlings to finish the task quickly.
B2 verb /ʌpˈhoʊld/

uphold

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

Unheard

Meaning
not heard or listened to; not given a hearing; unknown or unfamiliar
Example
His complaints went unheard by the management.
C2 adjective /ʌnˈkɒnʃənəbl/

unconscionable

Meaning
shockingly unfair or unreasonable
Example
The company made unconscionable profits from the crisis.
C2 noun /ˈʌŋɡwənt/

unguent

Meaning
A soothing or healing ointment applied to the skin.
Example
The doctor applied an unguent to heal the burn.
C1 adjective /ʌnˈwɪtɪŋ/

unwitting

Meaning
Not aware of what is happening; done without realizing.
Example
She became an unwitting participant in the scam.
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.
B1 adjective /ˈʌpər/

upper

Meaning
higher in position or rank
Example
The upper floor of the building is under renovation.
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 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.
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.
C1 verb /ʌpˈruːt/

uproot

Meaning
To pull something out of the ground; to remove or displace completely.
Example
They uprooted the old tree from the garden.
B2 adjective /ˌʌnkənˈvɪnsɪŋ/

Unconvincing

Meaning
failing to persuade or impress; not believable or credible
Example
His excuse for being late was completely unconvincing.
B1 adjective /ʌnˈmærid/

unmarried

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

ultramundane

Meaning
Relating to things beyond the physical world; supernatural or transcendental.
Example
Philosophers often discuss ultramundane realities beyond human perception.
B1 verb /ʌnˈræp/

unwrap

Meaning
remove wrapping or covering from something; reveal something gradually or clearly
Example
She carefully unwrapped the gift with excitement.
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 /ʌnˈʃʊr/

unsure

Meaning
not certain or confident; feeling doubt
Example
She felt unsure about the decision.
B2 adjective /ˌʌndɪˈzaɪərəbl/

Undesirable

Meaning
not wanted or wished for; harmful or unpleasant
Example
The new policy had several undesirable consequences.
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 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 adjective /ˌʌnpriːpəˈzɛsɪŋ/

unprepossessing

Meaning
not attractive or appealing in appearance
Example
Despite his unprepossessing looks, he was very kind and intelligent.
A1 noun /ˈʌŋkəl/

uncle

Meaning
the brother of one's father or mother
Example
My uncle is visiting us next week.
C1 noun /ˌjuːnɪˈfɔːrməti/

Uniformity

Meaning
the quality of being uniform; consistency or sameness
Example
The uniformity of the design created a pleasing visual effect.
C1 adjective /ʌnˈweɪ.vər.ɪŋ/

unwavering

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

unexceptionable

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

underclothes

Meaning
Clothing worn beneath outer clothes, such as underwear or lingerie
Example
He folded his underclothes neatly before packing them.
B2 adjective /juːˈnæn.ɪ.məs/

Unanimous

Meaning
fully in agreement; shared by all
Example
The committee reached a unanimous decision.
C1 adjective /ˈʌndərhænd/

underhand

Meaning
done secretly and dishonestly; deceitful
Example
The politician was accused of using underhand tactics to win the election.
B1 adjective /ʌnˈlaɪk/

Unlike

Meaning
different from; not similar to
Example
Unlike his brother, he prefers quiet activities.
B2 verb /ˌʌndərˈɛstɪmeɪt/

underestimate

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

Unnecessary

Meaning
not needed; not required; pointless
Example
The meeting was unnecessary since all decisions were already made.
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.
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.
C1 adjective /ʌnˈruːli/

Unruly

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

unafraid

Meaning
Not feeling fear; brave or courageous
Example
She walked into the dark room, unafraid of what might be inside.
C2 adjective /juːˈʒʊəriəs/

usurious

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

Unstable

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

uninhabitable

Meaning
Not suitable or safe for people to live in.
Example
Rapid urbanization can make cities uninhabitable.
C1 verb /ʌnˈsɛtl/

unsettle

Meaning
To disturb or make someone feel anxious or uneasy.
Example
The sudden news unsettled the entire community.
C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

Meaning
too bad to be forgiven; inexcusable
Example
His betrayal of trust was an unpardonable offense.
C2 verb /ʌnˈɑːrm/

unarm

Meaning
to remove weapons from someone or to deprive of means of attack or defense
Example
The soldiers were ordered to unarm the prisoners.
B2 adjective /ʌnˈbreɪkəbəl/

Unbreakable

Meaning
not able to be broken or damaged; very strong and durable
Example
Their friendship formed an unbreakable bond.
B1 adjective /ʌnˈeɪ.bəl/

Unable

Meaning
lacking the power, skill, or means to do something
Example
He was unable to attend the meeting.
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.
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.
B2 adverb /ˈɜːrdʒəntli/

urgently

Meaning
in a way that requires immediate attention or action
Example
The patient urgently needs medical attention.
C1 adjective /ˌʌnɪnˈhɪbɪtɪd/

uninhibited

Meaning
Not restrained or restricted; free in behavior or expression.
Example
She gave an uninhibited laugh at the joke.
C1 adjective /ʌnˈvaɪəbl/

unviable

Meaning
Not capable of working successfully; not feasible or practical.
Example
The project was deemed unviable due to high costs.
C2 adjective /ʌnˈwəʊntɪd/

unwonted

Meaning
Unusual, uncommon, or out of the ordinary.
Example
She spoke with an unwonted gentleness that surprised everyone.
B2 adverb /ʌnˈdaʊtɪdli/

undoubtedly

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

unforeseen

Meaning
Not anticipated or predicted; unexpected.
Example
The project faced unforeseen challenges that delayed its completion.
B2 verb /ˌʌndərˈɡoʊ/

undergo

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