C2 adjective /ʌnˈlɛtəd/

unlettered

文盲

Meaning

lacking education or the ability to read and write; illiterate

Example

The unlettered villagers relied on oral traditions to preserve their history.

那些文盲村民依赖口头传统来保存他们的历史。

C2 verb /ʌnˈfrɒk/

unfrock

剥夺神职

Meaning

To remove a priest from his position or deprive someone of a rank.

Example

The corrupt priest was unfrocked after the investigation.

腐败的牧师在调查后被解除职务。

B1 noun /juːˈten.səlz/

Utensils

餐具

Meaning

tools or implements used for cooking, eating, or serving food

Example

Please wash all the cooking utensils after preparing dinner.

请在准备晚餐后清洗所有的厨房用具。

B2 adjective /ʌnˈkwɒl.ɪ.faɪd/

Unqualified

不合格的; 无资格的;

Meaning

not having the necessary skills or qualifications; complete or absolute

Example

He was unqualified for the engineering position due to lack of experience.

他因缺乏经验而不适合这个工程职位。

B2 adjective /ˈʌpˌraɪt/

Upright

诚实且道德正确；垂直或挺立的姿势

Meaning

honest and morally correct; vertical or erect in position

Example

She is known for being an upright and honest businesswoman.

她以诚实和正直的商业女性而闻名。

A2 adjective /ʌnˈkʌmf.tə.bəl/

Uncomfortable

不舒服

Meaning

causing or feeling slight pain or physical discomfort; making someone feel embarrassed, awkward, or anxious

Example

The chair was so uncomfortable that I couldn't sit in it for more than ten minutes.

这个椅子太不舒服了，我坐在上面超过十分钟就坐不下来了。

B1 adjective /ʌnˈtru/

Untrue

错误的; 不正确的

Meaning

not true; false; incorrect

Example

His statement about the incident was completely untrue.

他关于事件的陈述完全是错误的。

C1 adjective /ʌnˈʃeɪkən/

Unshaken

坚定不移; 坚固

Meaning

not disturbed or affected; firm and steady; unwavering

Example

Her faith remained unshaken despite all the challenges.

尽管面临所有挑战，她的信念依然坚定不移。

C1 noun /juːˈtoʊpiə/

utopia

乌托邦

Meaning

An imagined perfect society or place where everything is ideal.

Example

Many philosophers dreamed of creating a utopia for humanity.

许多哲学家梦想着为人类创造一个乌托邦。

B2 adjective /ʌnˈiːzi/

Uneasy

不安的; 焦虑的; 不舒服的

Meaning

worried; anxious; uncomfortable; restless

Example

She felt uneasy about walking alone at night.

她在夜晚独自行走时感到不安。

C1 adjective /ʌnˈmaɪndfəl/

Unmindful

不留心的; 疏忽的;

Meaning

not paying attention; careless; heedless

Example

She was unmindful of the danger around her.

她没有注意到周围的危险。

B2 adjective /ʌnˈsteɪbəl/

Unstable

不稳定

Meaning

likely to change; not steady or secure; unsteady

Example

The unstable economy made people worried about their jobs.

不稳定的经济让人们担心他们的工作。

B2 adjective /ʌnˈberəbəl/

Unbearable

无法忍受

Meaning

too painful, annoying, or unpleasant to tolerate; impossible to endure

Example

The heat in the desert was unbearable.

沙漠中的热度是无法忍受的。

C1 noun /ˈʌndərˌteɪkər/

undertaker

殡葬员

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.

殡葬员为葬礼服务准备了尸体。

B1 adjective /ˌʌnˈɪntrəstɪŋ/

uninteresting

无趣的

Meaning

not holding attention or curiosity; boring

Example

The lecture was uninteresting and difficult to stay focused on.

这次讲座很无趣，很难集中注意力。

C1 verb /ʌnˈkɔrk/

uncork

开瓶

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.

他开了葡萄酒，并为每个人倒了一杯。

B2 noun /ˈʌpˌkiːp/

up-keep

维护

Meaning

The process or cost of maintaining something in good condition.

Example

The upkeep of the old house is very expensive.

老房子的维护非常昂贵。

C1 adjective /juːˈbɪkwɪtəs/

ubiquitous

无处不在

Meaning

Existing or being everywhere at the same time.

Example

Social media has become ubiquitous among young people.

社交媒体在年轻人中变得无处不在。

B2 adjective /ʌn.rɪˈleɪ.tɪd/

Unrelated

无关的; 不相关

Meaning

having no connection or relationship; not connected by family ties

Example

The two incidents were completely unrelated to each other.

这两个事件完全无关。

C1 adjective /ʌnˈvɔɪst/

unvoiced

未表达

Meaning

not expressed in speech; in phonetics, a sound produced without vocal cord vibration

Example

The student kept her opinion unvoiced during the meeting.

学生在会议期间保持她的意见未表达。

C1 adjective /ˌʌndərˈhændɪd/

underhanded

阴险

Meaning

acting or done in a dishonest or secret way

Example

They exposed the company's underhanded dealings with its suppliers.

他们揭露了公司与供应商之间的隐秘交易。

B2 adjective /ʌnˈwɜːrði/

Unworthy

不配; 没有价值

Meaning

not deserving respect or attention; lacking worth or merit

Example

He felt unworthy of such praise and recognition.

他觉得自己不配得到这样的赞扬和认可。

B1 adjective /ʌnˈseɪf/

Unsafe

不安全; 危险的;

Meaning

involving or causing danger or risk; not protected from harm

Example

It is unsafe to walk alone in this neighborhood at night.

晚上在这个社区独自行走是不安全的。

B2 adjective /ˌʌndɪˈveləpt/

Undeveloped

未开发的; 未成熟的; 原始的

Meaning

not yet developed; immature or primitive

Example

The undeveloped land was later turned into a park.

未开发的土地后来被改建成了一个公园。

A2 noun /ˌʌndərˈstændɪŋ/

understanding

理解

Meaning

the ability to grasp the meaning, significance, or nature of something

Example

Her understanding of the issue was impressive.

她对这个问题的理解令人印象深刻。

C1 adjective /ʌnˈɡɑː.dɪd/

Unguarded

不设防的

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.

在一个不设防的时刻，她揭示了她对这个项目的真实感受。

B2 adjective /ʌnˈθɪŋkəbl/

Unthinkable

难以想象的

Meaning

impossible to conceive or imagine; beyond belief or consideration

Example

It was unthinkable that such a tragedy could happen in our peaceful town.

在我们和平的小镇上发生这样一场悲剧，简直是难以想象的。

B2 adjective /ʌnˈhɛlpfəl/

unhelpful

没有帮助的

Meaning

not providing help or support; making a situation harder rather than easier

Example

His unhelpful attitude slowed down the entire project.

他没有帮助的态度拖慢了整个项目。

C1 adjective /ʌnˈsɪvəl/

Uncivil

不文明的; 粗鲁的;

Meaning

not polite or courteous; rude and discourteous in behavior

Example

His uncivil remarks during the meeting offended everyone present.

他在会议上的不文明言论冒犯了在场的每一个人。

C1 adjective /ʌnˈweɪ.vər.ɪŋ/

unwavering

坚定

Meaning

Steady or resolute; not wavering.

Example

He showed unwavering dedication to his goal.

他展示了对目标的坚定承诺。

C1 adjective ʌnˈwɔːr.rən.tɪd

unwarranted

不合理的

Meaning

Not justified or necessary; without good reason.

Example

His anger toward the staff was completely unwarranted.

他对员工的愤怒是完全不合理的。

A2 adjective /ʌnˈhel.θi/

Unhealthy

不健康的; 有害的

Meaning

harmful to health; not in good health; detrimental to well-being

Example

Eating too much fast food is unhealthy for your body.

吃太多快餐对你的身体不健康。

C1 adjective /ˌʌnˈɪntɪmeɪtɪŋ/

unintimating

没有暗示

Meaning

Not giving a hint or suggestion; not indicating.

Example

His unintimating tone gave no clue of his true feelings.

他的没有暗示的语气没有透露他真正的感受。

B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

不寻常; 奇怪;

Meaning

not typical; strange; different from what is normal

Example

She wore an unusual dress to the party.

她穿了一件不寻常的衣服去参加派对。

C2 adjective /ʌkˈsɔːriəs/

uxorious

过度宠爱妻子

Meaning

excessively fond of or submissive to one's wife

Example

He was so uxorious that he agreed with everything his wife said.

他是如此的宠爱妻子，以至于同意了妻子说的每一件事。

B2 adjective /ʌnˈbiːtən/

Unbeaten

不败的; 未被击败的

Meaning

not defeated; having never lost; undefeated

Example

The team remains unbeaten this season.

这个团队本赛季保持不败。

C1 adjective /ʌnˈtaɪərɪŋ/

Untiring

不知疲倦的; 坚持不懈的; 永不止步的

Meaning

continuing without stopping; persistent; tireless

Example

Her untiring efforts finally led to success.

她的不知疲倦的努力最终带来了成功。

B2 adjective /ʌnˈfeɪ.vər.ə.bəl/

Unfavourable

不利的; 逆境的

Meaning

not helpful or advantageous; adverse

Example

The weather conditions were unfavourable for our outdoor event.

恶劣的天气条件不利于我们的户外活动。

C1 adjective ʌnɪnˈhæbɪtəbəl

uninhabitable

不可居住

Meaning

Not suitable or safe for people to live in.

Example

Rapid urbanization can make cities uninhabitable.

快速城市化可能使城市变得无法居住。

B2 adjective /ʌnˈtʃeɪndʒəbəl/

Unchangeable

不可改变的; 固定的;

Meaning

not able to be changed or altered; fixed and permanent

Example

The laws of physics are unchangeable principles that govern the universe.

物理法则是不变的原则，支配着宇宙。

A1 interjection /ʌ/

uh

呃

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.

呃，我不确定这是不是正确的答案。

B1 verb /ʌnˈpæk/

unpack

拆开

Meaning

to remove items from a container; to explain or analyze something in detail

Example

After arriving home, she began to unpack her suitcase.

到家后，她开始拆开自己的行李箱。

C1 adjective /ʌnˈsəʊʃəl/

unsocial

不合群的

Meaning

not enjoying the company of others; avoiding social interaction; contrary to social norms

Example

He prefers unsocial hours so he can work alone without interruptions.

他更喜欢不合群的工作时间来独自工作。

Meaning

To undo twisted or knitted threads; to solve or explain something complicated.

Example

The detective worked hard to unravel the mystery.

A2 adjective /ˈjuːʒəl/

usual

常见

Meaning

habitually or typically occurring or done

Example

It’s our usual meeting spot.

这是我们常见的会议地点。

B2 adjective /ʌnˈlɔːfl/

Unlawful

非法; 不合法

Meaning

not authorized by law; illegal

Example

The court declared the search unlawful.

法院宣布搜索是非法的。

B1 adverb /ʌnˈfɔːrtʃənətli/

Unfortunately

不幸地

Meaning

used to express regret or disappointment about something

Example

Unfortunately, the weather was bad for our picnic.

很遗憾，天气不适合我们的野餐。

C2 noun /ˌjuːzɜːrˈpeɪʃən/

usurpation

篡夺

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.

将军对总统职位的篡夺导致了政治动荡。

B2 adjective /ˈʌt.moʊst/

Utmost

最极; 极限

Meaning

greatest; most extreme; maximum possible

Example

She showed utmost care while handling the fragile items.

她在处理脆弱物品时表现出最大的关心。

B2 adjective /ʌnˈwel.kəm/

Unwelcome

不受欢迎的; 不想要的; 不邀请的

Meaning

not wanted or accepted; not invited or pleasant

Example

The unwelcome news ruined their vacation plans.

不受欢迎的消息破坏了他们的度假计划。

C1 adjective /ʌnˈmænɪdʒəbəl/

Unmanageable

无法控制的; 失控

Meaning

difficult or impossible to control or handle

Example

The large class became unmanageable without proper supervision.

没有适当的监督，班级变得无法控制。

C1 adjective ˌʌn.pəˈtɜːbd

unperturbed

不为某事烦恼或困扰；冷静且镇定

Meaning

Not worried or disturbed by something; calm and composed.

Example

She remained unperturbed despite the challenges.

尽管有挑战，她依然保持冷静。

B2 adjective ʌnˈprɛsɪˌdɛntɪd

unprecedented

前所未有

Meaning

Never done or known before; without previous example.

Example

Unprecedented advancements in science changed human lives.

科学上的前所未有的进展改变了人类的生活。

C1 adjective /ˌʌnəˈteɪnəbl/

unattainable

无法实现的

Meaning

impossible to achieve, reach, or accomplish

Example

For many, becoming a professional athlete remains an unattainable dream.

对许多人来说，成为职业运动员仍然是一个无法实现的梦想。

C2 verb /ʌnˈjoʊk/

unyoke

解开

Meaning

To release from a yoke or to free from restraint or obligation.

Example

The farmer unyoked the oxen after a long day of work.

农民在长时间工作后解开了牛的套索。

C1 adjective /ʌnˈsaɪtli/

unsightly

难看

Meaning

Unpleasant to look at; ugly.

Example

The garbage pile created an unsightly view in the park.

垃圾堆在公园里创造了一个难看的景象。

B2 adverb /ʌnˈplɛzəntli/

unpleasantly

令人不快地

Meaning

in a way that causes discomfort, annoyance, or displeasure; in an unfriendly or disagreeable manner

Example

The room was unpleasantly hot during the afternoon.

下午房间里热得令人不快。

B2 verb /ʌnˈtaɪ/

untie

解开

Meaning

to loosen or remove a knot or binding; to release something that is tied

Example

She untied the rope to free the boat.

她解开绳子来释放船只。

C2 adjective /ʌnˈmɪtɪɡeɪtɪd/

unmitigated

完全

Meaning

absolute; not lessened or moderated

Example

The meeting was an unmitigated disaster.

会议是一次完全的灾难。

B1 adjective /ˈɜːrbən/

urban

城市的

Meaning

related to, characteristic of, or situated in a city or town

Example

Urban areas often have higher population density than rural areas.

城市地区通常比乡村地区有更高的人口密度。

C1 adjective /ʌnˈsoʊld/

unsold

未售出的

Meaning

not sold; remaining without a buyer

Example

The unsold goods were returned to the warehouse.

未售出的商品被退回仓库。

C1 noun /ˈʌp.tɜːn/

upturn

改善

Meaning

An improvement or upward trend in a situation, especially in business or economy.

Example

The company experienced an upturn in sales last quarter.

该公司在上个季度销售情况有所改善。

B2 adjective /ˈʌl.tɪ.mət/

Ultimate

最终的; 极致的; 终极的

Meaning

being the best or most extreme example of its kind; final; last

Example

This is the ultimate test of your skills.

这是你技能的终极考验。

B2 adjective /ʌnˈɪndʒərd/

uninjured

未受伤

Meaning

Without injury; not physically harmed.

Example

All the passengers were rescued uninjured.

所有乘客都没有受伤并被救援。

C2 noun /ʌnˈkloʊðɪŋ/

unclothing

脱衣

Meaning

the act or process of removing clothing

Example

The child quickly ran inside for unclothing after playing in the mud.

孩子在泥地玩耍后迅速跑进去脱衣。

C1 verb /ˌʌndəˈreɪt/

underrate

低估

Meaning

to fail to recognize the full value or importance of something or someone

Example

Many people underrate the benefits of regular exercise.

许多人低估了规律锻炼的好处。

B1 adjective /ʌnˈmærid/

unmarried

未婚

Meaning

Not married; single.

Example

He is thirty-five and still unmarried.

他三十五岁，仍然未婚。

B2 adjective /ˌʌndərˈlaɪɪŋ/

underlying

基本的

Meaning

basic or hidden but important; forming the foundation of something

Example

The underlying reason for the conflict was never addressed.

冲突的根本原因从未得到解决。

C1 adjective /ˌʌnəˈdɔːrnd/

unadorned

简单的，未装饰的

Meaning

Plain and simple; not decorated.

Example

The room was unadorned, with only a table and a chair.

房间简单，只有一张桌子和一把椅子。

C2 adjective /ˌʌnpriːpəˈzɛsɪŋ/

unprepossessing

不吸引人

Meaning

not attractive or appealing in appearance

Example

Despite his unprepossessing looks, he was very kind and intelligent.

尽管他的外貌不吸引人，他还是非常友善和聪明。

A2 adjective /ˈjuːs.ləs/

Useless

无用

Meaning

having no beneficial purpose; not useful

Example

This broken computer is completely useless.

这个坏掉的电脑完全是无用的。

C2 adjective /ʌnˈɡeɪnli/

ungainly

笨拙

Meaning

Awkward, clumsy, or lacking grace in movement or appearance.

Example

The tall boy moved in an ungainly manner.

那个高个男孩以笨拙的方式走动。

C2 noun /ˌjuːnɪˈtɛəriən/

unitarian

一神论者

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.

一神论教会以其包容和开放的思想方式而闻名。

C1 adjective /ʌnˈtʃælɪndʒd/

Unchallenged

无可争议的; 被接受的没有反对; 没有对手

Meaning

not disputed or questioned; accepted without opposition; having no rival

Example

He remained the unchallenged champion for five years.

他五年保持不败的冠军。

C2 noun /ˈʌndərlɪŋ/

underling

下属

Meaning

a person of low rank or importance; a subordinate

Example

The manager ordered his underlings to finish the task quickly.

经理命令他的下属快速完成任务。

C2 adjective /ʌnˈkɒnʃənəbl/

unconscionable

不合理的

Meaning

shockingly unfair or unreasonable

Example

The company made unconscionable profits from the crisis.

公司从危机中获得了不合理的利润。

C2 adjective /ˈɜːrsaɪn/

ursine

熊似的

Meaning

Relating to or resembling a bear.

Example

The man’s ursine strength amazed everyone.

那个人熊似的力量让所有人都吃惊。

B2 verb /ʌnˈkʌvə(r)/

uncover

揭示

Meaning

to reveal something that was hidden or secret

Example

The investigation uncovered new evidence.

调查揭示了新的证据。

B2 adverb /ʌnˈfɛərli/

unfairly

不公平地

Meaning

In a manner that is not just, reasonable, or impartial

Example

He was treated unfairly by the committee.

他被委员会不公平地对待。

C1 adjective /ˌʌnəˈkaʊntəbl/

unaccountable

无法解释

Meaning

Not able to be explained or justified.

Example

She felt an unaccountable fear as she entered the dark room.

她进入黑暗的房间时感到无法解释的恐惧。

C2 noun /ˈʌmbrɪdʒ/

umbrage

冒犯，愤怒

Meaning

A feeling of resentment or offense.

Example

She took umbrage at his rude remark.

她对他的粗鲁言论感到愤怒。

B2 adjective /ʌnˈɑːrmd/

unarmed

手无寸铁

Meaning

Not equipped with or carrying weapons

Example

The police found the suspect unarmed during the search.

警察在搜查过程中发现嫌疑人没有武器。

B2 adjective /ʌnˈrɪəl/

unreal

不真实的

Meaning

not real or not based on reality; exaggerated or imaginary

Example

The experience felt unreal after the sudden news.

突如其来的消息后，这种经历感觉不真实。

B2 verb /ˈjuːtɪlaɪz/

utilize

利用

Meaning

to make practical or effective use of something

Example

The company aims to utilize solar energy for production.

公司旨在利用太阳能进行生产。

B2 adjective /ˌʌnkənˈvɪnsɪŋ/

Unconvincing

不可信

Meaning

failing to persuade or impress; not believable or credible

Example

His excuse for being late was completely unconvincing.

他因迟到而给出的借口完全不可信。

C1 noun /ʌnɪmˈpɔːrtəns/

unimportance

不重要

Meaning

the state or quality of being insignificant or not important

Example

He dismissed the issue with a sense of unimportance.

他以無關緊要的態度忽略了這個問題。

A1 noun /ˈʌŋkəl/

uncle

叔叔/舅舅

Meaning

the brother of one's father or mother

Example

My uncle is visiting us next week.

我的叔叔下周会来看我们。

B2 noun /ʌnˈkɒnʃəsnəs/

unconsciousness

无意识

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.

事故后，他昏迷了几个小时。

C1 adjective /ʌnˈkuːθ/

uncouth

粗鲁

Meaning

Lacking good manners, refinement, or grace; awkward or rough.

Example

His uncouth behavior shocked the guests at the party.

他粗鲁的行为让聚会上的客人感到震惊。

B1 adjective /ʌnˈlaɪkli/

Unlikely

不太可能; 不大可能

Meaning

not likely to happen; improbable

Example

It's unlikely to rain today with such clear skies.

今天晴空万里，几乎不可能下雨。

B2 verb /ʌpˈhoʊld/

uphold

维护

Meaning

to maintain or support a principle, law, or decision

Example

The judge promised to uphold justice at all costs.

法官承诺不惜一切代价维护正义。

B2 adverb /ʌnˈdaʊtɪdli/

undoubtedly

毫无疑问

Meaning

without a doubt, certainly

Example

He is undoubtedly the best player on the team.

他毫无疑问是队里最好的球员。

B2 adverb /ˈɜːrdʒəntli/

urgently

紧急地

Meaning

in a way that requires immediate attention or action

Example

The patient urgently needs medical attention.

病人紧急地需要医疗救助。

C2 verb /ʌnˈɑːrm/

unarm

解除武装

Meaning

to remove weapons from someone or to deprive of means of attack or defense

Example

The soldiers were ordered to unarm the prisoners.

士兵接到命令解除囚犯的武装。

B2 adjective /ˌʌnəˈweər/

Unaware

无意识的; 不知道的; 没有意识

Meaning

not knowing or realizing; having no knowledge of something

Example

She was completely unaware of the danger.

她完全没有意识到危险。

B1 adjective /ˌʌndərˈstændəbl/

understandable

可以理解的

Meaning

Able to be understood; reasonable or justifiable.

Example

Her reaction was understandable given the situation.

考虑到情况，她的反应是可以理解的。

C1 adjective /ʌnˈseɪvəri/

unsavory

令人不快

Meaning

Disagreeable, unpleasant, or morally offensive.

Example

The politician was linked to an unsavory scandal.

那位政治家与一宗令人不快的丑闻有关。

C1 noun /ˌʌnprɪˈdɪktəˌbɪləti/

unpredictability

不可预测性

Meaning

The quality of being impossible to predict or anticipate.

Example

The unpredictability of the weather made the trip uncertain.

天气的不可预测性使得旅行充满不确定性。

A1 pronoun /ʌs/

us

我们

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.

她给了我们一个礼物。

B2 noun ˈjuːnəti

unity

团结

Meaning

The state of being united or joined as a whole.

Example

Unity among people led to victory.

人们之间的团结带来了胜利。

C2 verb /ʌnˈkloʊð/

unclothe

脱衣; 脱掉衣服

Meaning

to remove clothing from someone or something

Example

The nurse helped unclothe the patient for the examination.

护士帮助病人脱衣进行检查。

C1 adjective /ʌnˈfɛtərd/

unfettered

不受限制的

Meaning

not restricted or confined; free

Example

The artist enjoyed unfettered freedom of expression.

艺术家享受了无限制的表达自由。

B1 adjective /ʌnˈkʊkt/

uncooked

生的

Meaning

Not cooked; in a raw state.

Example

Eating uncooked meat can be dangerous.

吃生肉可能是危险的。

C1 noun /ˌjuːnɪˈfɔːrməti/

Uniformity

一致性；统一性；相同状态

Meaning

the quality of being uniform; consistency or sameness

Example

The uniformity of the design created a pleasing visual effect.

设计的一致性创造了一个吸引人的视觉效果。

C2 adjective /ʌnˈtʃeɪst/

Unchaste

不道德的; 不纯洁的;

Meaning

not celibate; having engaged in sexual relations; lacking moral purity

Example

The conservative society considered her behavior unchaste and improper.

保守的社会认为她的行为不道德和不合适。

B1 adjective /ʌnˈplɛz.ənt/

Unpleasant

令人不悦的

Meaning

not giving or causing pleasure; disagreeable

Example

The medicine had an unpleasant taste.

药物有一种令人不悦的味道。

C1 verb /ˌʌndərˈlaɪ/

underlie

位于...之下

Meaning

to be the hidden cause or basis of something

Example

Strong cultural traditions underlie the community's practices.

强大的文化传统是社区实践的基础。

C1 adjective /ʌnˈvaɪəbl/

unviable

不可行的

Meaning

Not capable of working successfully; not feasible or practical.

Example

The project was deemed unviable due to high costs.

由于高昂的成本，该项目被认为不可行。

B1 adjective /juːˈnaɪtɪd/

United

联合的; 一致的; 团结的

Meaning

joined together for a common purpose; in agreement

Example

The team was united in their goal to win.

团队在他们的目标上达成了统一。

B1 adjective /ʌnˈfrɛndli/

unfriendly

不友好的

Meaning

not kind or welcoming; hostile or cold in behavior or attitude

Example

The shop owner seemed unfriendly to new customers.

店主对新顾客显得不友好。

C2 adjective ˌʌn.əˈseɪ.lə.bəl

unassailable

不可攻破

Meaning

Unable to be attacked, questioned, or defeated.

Example

An unassailable position ensures dominance.

不可攻破的位置确保主导地位。

A2 preposition /əˈpɒn/

upon

之后

Meaning

on or immediately after

Example

Upon hearing the news, he rushed to the hospital.

听到消息后，他赶到医院。

C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

违宪的

Meaning

not in accordance with a political constitution; violating constitutional principles

Example

The court declared the new law unconstitutional.

法院宣布这项新法律违宪。

C1 adjective /ʌnˈtʌtʃəbəl/

Untouchable

不可触碰的; 无法批评或攻击

Meaning

not able to be touched or affected; beyond criticism or attack

Example

The CEO seemed untouchable despite the scandal.

即使有丑闻，首席执行官似乎仍然是不可触碰的。

C2 verb /ˈʌndərˌmæn/

underman

人员不足

Meaning

to supply with fewer workers or personnel than needed

Example

The hospital was undermanned during the flu outbreak.

医院在流感爆发期间人手不足。

B1 adjective /ʌnˈlaɪk/

Unlike

不同的; 不相似的

Meaning

different from; not similar to

Example

Unlike his brother, he prefers quiet activities.

与他哥哥不同，他喜欢安静的活动。