C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

未承认的

Meaning

Not recognized, admitted, or accepted; ignored or unnoticed

Example

Her contributions to the project went unacknowledged.

她对项目的贡献未被承认。

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 /ʌnˈdɔːntɪd/

Undaunted

无畏的; 勇敢的; 不屈的;

Meaning

not intimidated or discouraged by difficulty, danger, or disappointment

Example

Despite the setbacks, she remained undaunted in pursuing her goals.

尽管遇到挫折，她在追求目标时依然无畏。

C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

不可宽恕的

Meaning

too bad to be forgiven; inexcusable

Example

His betrayal of trust was an unpardonable offense.

他的背叛是不可原谅的罪行。

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。

C2 adjective /ˌʌn.təˈwɔːrd/

untoward

意外的

Meaning

Unexpected and inappropriate or inconvenient.

Example

The meeting ended without any untoward incidents.

会议在没有任何意外事件的情况下结束。

A1 verb /juːz/

use

使用

Meaning

to employ something for a purpose; to take advantage of

Example

I use my computer for work and entertainment.

我用我的计算机来工作和娱乐。

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.

C1 adjective /ˌʌndərˈsteɪtɪd/

understated

低调的

Meaning

Presented in a subtle and restrained way.

Example

She wore an elegant but understated dress.

她穿了一件优雅但低调的裙子。

C2 noun juːˈbɪkwɪti

ubiquity

普遍性

Meaning

The fact of appearing everywhere or of being very common.

Example

The ubiquity of smartphones has transformed communication.

智能手机的普遍性改变了通信方式。

B2 adjective /ʌnˈfeɪv(ə)rəbəl/

unfavorable

不利

Meaning

not beneficial or advantageous; showing disapproval or opposition

Example

The proposal received an unfavorable response from the committee.

提案收到了委员会的负面回应。

B2 noun /ʌnˈrest/

Unrest

不安；动荡；社会或政治动乱

Meaning

a state of dissatisfaction and disturbance; social or political disorder

Example

The economic crisis led to widespread social unrest.

经济危机导致了广泛的社会不安。

C2 adjective /ʌnˈspɛərɪŋ/

unsparing

无情的

Meaning

Showing no mercy or generosity; harsh or severe.

Example

The critic was unsparing in his review of the play.

评论家在他的剧评中毫不留情。

B1 adjective /ˈʌpər/

upper

上层

Meaning

higher in position or rank

Example

The upper floor of the building is under renovation.

建筑物的上层正在翻修。

B1 adjective /ʌnɪmˈplɔɪd/

Unemployed

失业

Meaning

without a job; not having paid work

Example

He has been unemployed for six months now.

他已经失业六个月了。

B1 noun /ʌnˈhæp.i.nəs/

unhappiness

不快乐

Meaning

the state of being unhappy; sadness or dissatisfaction

Example

Her constant unhappiness affected everyone around her.

她持续的不快乐影响了周围的每一个人。

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。

B1 adjective /ˌʌnbɪˈliːvəbəl/

Unbelievable

难以置信

Meaning

impossible to believe; extremely surprising or remarkable

Example

The magician's performance was absolutely unbelievable.

魔术师的表演简直令人难以置信。

B1 adjective /ˈɜːrdʒənt/

Urgent

紧急

Meaning

requiring immediate action or attention; pressing

Example

The patient needs urgent medical attention.

病人需要紧急医疗照顾。

B2 adjective /ʌnˈbæləns/

Unbalanced

不平衡的; 不稳定的

Meaning

not balanced; lacking stability or equilibrium; mentally unstable

Example

The unbalanced table kept wobbling.

不平衡的桌子摇晃着。

B2 verb /ʌnˈveɪl/

unveil

揭示

Meaning

to reveal or disclose something, especially in a formal manner

Example

The company will unveil a new product next week.

公司将在下周揭示一款新产品。

B1 adjective /ʌnˈfeər/

Unfair

不公平; 不正当;

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.

指责她做了她没有做的事是不公平的。

B2 noun /ˈʌndərkləʊðz/

underclothes

内衣

Meaning

Clothing worn beneath outer clothes, such as underwear or lingerie

Example

He folded his underclothes neatly before packing them.

他在打包前把内衣叠得整整齐齐。

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。

A2 verb /ʌpˈset/

upset

烦扰

Meaning

to make someone worried, sad, or angry; to disturb

Example

The bad news upset everyone.

坏消息 upset 每个人。

B2 adjective /ˌʌndɪˈzaɪərəbl/

Undesirable

不受欢迎的; 有害的; 令人不快的

Meaning

not wanted or wished for; harmful or unpleasant

Example

The new policy had several undesirable consequences.

新政策带来了几个不受欢迎的后果。

B2 adjective /ʌnˈkɒmən/

uncommon

不常见

Meaning

rare, unusual, or remarkable

Example

It is uncommon to see snow in this region.

在这个地区看到雪是不常见的。

B2 adjective /ʌnˈfeɪθ.fəl/

Unfaithful

不忠诚

Meaning

not loyal or true to a spouse, partner, or commitment

Example

He was unfaithful to his wife for many years.

他对妻子不忠诚多年。

B1 adverb /ʌnˈjuːʒuəli/

unusually

异常地

Meaning

in a way that is not typical or expected; to an uncommon degree

Example

It was unusually cold for this time of year.

对一年中的这个时候来说，天气异常寒冷。

B2 adjective /ʌnˈwaɪz/

unwise

不明智

Meaning

Showing poor judgment; not sensible or prudent.

Example

It would be unwise to invest all your money in one company.

把所有的钱都投入一家公司的做法不明智。

B2 adjective /ʌnˈiːkwəl/

Unequal

不平等; 不公正;

Meaning

not the same in quantity, size, or value; not fair or just

Example

The distribution of wealth is unequal in many countries.

财富的分配在许多国家是不平等的。

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。

C2 adjective /ʌnˈfeɪnd/

unfeigned

真诚

Meaning

genuine; not pretended or insincere

Example

She expressed unfeigned joy at her friend's success.

她在朋友的成功上表达了真诚的喜悦。

C1 adjective /ˌʌnfɔːrˈsiːn/

unforeseen

Meaning

Not anticipated or predicted; unexpected.

Example

The project faced unforeseen challenges that delayed its completion.

B2 adjective /ˌʌnəˈvɔɪdəbəl/

Unavoidable

不可避免的; 无法回避的; 必然的

Meaning

cannot be avoided; certain to happen; inevitable

Example

The meeting is unavoidable, so we must attend.

这个会议是无法避免的，我们必须参加。

B1 adjective /ʌnˈnesəseri/

Unnecessary

不必要的；多余的

Meaning

not needed; not required; pointless

Example

The meeting was unnecessary since all decisions were already made.

会议是多余的，因为所有的决定已经做出。

C2 noun /ˈjuːʒəri/

usury

高利贷

Meaning

The practice of lending money at unreasonably high interest rates.

Example

The law strictly prohibits usury.

法律严格禁止高利贷。

B2 adjective /ʌnˈsiːn/

Unseen

看不见的；未曾看到或注意到的

Meaning

not previously seen or noticed; invisible; hidden

Example

The unseen forces of nature can be very powerful.

自然界的看不见的力量可能非常强大。

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。

C1 noun /ˈʌp.ʃɒt/

Upshot

结果; 结论

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.

会议的结果是决定推迟项目。

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 verb /ˌʌndərˈsteɪt/

understate

低估

Meaning

To describe something as being less important or serious than it really is.

Example

He tends to understate his achievements.

他倾向于低估自己的成就。

A2 noun /ˈjuːnɪt/

unit

单元

Meaning

an individual thing or person regarded as a single and complete entity

Example

Each unit in the production line is carefully tested.

生产线上的每个单元都经过仔细测试。

C1 adjective /ˌʌnɪmˈplɔɪəbəl/

unemployable

不适合就业

Meaning

Not able to be employed; lacking the skills or qualities necessary for employment

Example

Due to his criminal record, he was considered unemployable in most companies.

由于他的犯罪记录，他在大多数公司被认为是不适合就业。

C1 adjective /ˌjuːnɪˈlætərəl/

Unilateral

单方面

Meaning

one-sided; involving only one party

Example

The country made a unilateral decision to withdraw from the treaty.

这个国家做出了单方面的决定，退出了条约。

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。

C1 adjective /ʌnˈɜːrθli/

unearthly

超自然的

Meaning

Strange or unnatural in a way that seems not of this world

Example

The forest was filled with an unearthly glow.

森林中充满了超自然的光辉。

C1 adjective /ʌnˈsteɪtɪd/

unstated

未声明

Meaning

not expressed directly in words; implied or left unsaid

Example

The contract included several unstated expectations.

合同包括了几个未声明的期望。

C1 noun /ˈjuːnɪsən/

unison

齐声

Meaning

Simultaneous performance or utterance of action or speech.

Example

The choir sang in unison.

合唱团齐声唱歌。

B2 adjective /ˌʌnəˈveɪləbəl/

unavailable

不可用

Meaning

Not able to be obtained, reached, or used; not present or accessible.

Example

The manager was unavailable to take calls during the meeting.

经理在会议期间不可用，无法接听电话。

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 adjective /ˈʌt.ɚ/

Utter

完全的; 绝对的; 全部的

Meaning

complete; absolute; total

Example

The movie was an utter disaster at the box office.

这部电影在票房上完全失败了。

C2 adjective /ˌʌltrəˈmʌndeɪn/

ultramundane

超凡

Meaning

Relating to things beyond the physical world; supernatural or transcendental.

Example

Philosophers often discuss ultramundane realities beyond human perception.

哲学家们常常讨论超越人类感知的超凡现实。

C2 adjective /ˌʌnprəˈpɪʃəs/

unpropitious

不利

Meaning

Not giving or indicating a good chance of success; unfavorable.

Example

The team began their journey under unpropitious weather conditions.

团队在不利的天气条件下开始了他们的旅程。

C2 adverb /ʌnˈɜːrɪŋli/

unerringly

毫无错误

Meaning

Without making any mistakes; always accurate

Example

The archer aimed unerringly at the target.

弓箭手毫无错误地瞄准了目标。

B2 adjective /ˌʌndɪˈnaɪəbl/

Undeniable

不容置疑

Meaning

impossible to deny or dispute; clearly true

Example

The evidence of his guilt was undeniable.

他的罪行证据是不容置疑的。

C1 adjective /ʌnˈkʌltʃəd/

Uncultured

不文明的; 无文化的

Meaning

lacking good manners, refinement, or education; uncivilized

Example

His uncultured behavior embarrassed everyone at the dinner party.

他在晚宴上的不文明行为让所有人感到尴尬。

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。

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。

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。

B2 noun /ʌnəˈbɪləti/

unability

无能

Meaning

the state of being unable to do something; incapacity

Example

His unability to solve the problem caused delays in the project.

他解决问题的无能导致了项目的延误。

B1 adjective /ˈjuːnɪfɔːrm/

Uniform

制服

Meaning

consistent; identical; standardized

Example

All students must wear a uniform to school.

所有学生必须穿制服上学。

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。

B2 noun /ˌʌnəˌveɪləˈbɪləti/

unavailability

不可用性

Meaning

The state of being not available or not accessible.

Example

The unavailability of the manager caused a delay in the project.

经理的不可用性导致了项目的延误。

A1 adverb /ʌp/

up

向上

Meaning

towards a higher position or level

Example

He climbed up the ladder quickly.

他迅速爬上了梯子。

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。

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。

B1 adjective /ʌnˈnoʊn/

Unknown

未知

Meaning

not known or identified; unfamiliar

Example

The author of this letter remains unknown.

这封信的作者仍然未知。

B1 adjective ʌnˈplænd

unplanned

未计划的

Meaning

Not planned or arranged in advance; happening spontaneously without preparation.

Example

Unplanned urbanization contributes to environmental issues.

无计划的城市化会加剧环境问题。

B2 noun /ʌnˈkaɪndnəs/

unkindness

不友善

Meaning

lack of kindness; cruel or inconsiderate behavior

Example

His unkindness hurt her feelings deeply.

他的不友善深深伤害了她的感情。

C2 adjective /ˈʌndjʊleɪtɪŋ/

undulating

波动的

Meaning

Having a smoothly rising and falling form or motion like waves.

Example

We drove through undulating hills.

我们驱车穿过起伏的山丘。

C1 adjective /ʌnˈθɪŋkɪŋ/

unthinking

欠考虑的

Meaning

done without careful thought; automatic or thoughtless

Example

His unthinking remark hurt her feelings.

他欠考虑的评论伤害了她的感情。

C2 adjective /ʌnˈflɛdʒd/

unfledged

未经训练的

Meaning

Inexperienced, immature, or not fully developed.

Example

The unfledged writer struggled to complete his first novel.

这个未经训练的作家难以完成他的第一本小说。

C1 verb /ʌnˈmɑːsk/

unmask

揭露；暴露真相

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.

调查帮助揭露了犯罪背后的真正罪犯。

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。

C2 adjective /ʌnˈflæpəbəl/

unflappable

冷静沉着

Meaning

calm and composed, especially in difficult situations

Example

Despite the crisis, he remained unflappable and confident.

尽管面临危机，他依然保持冷静沉着，充满自信。

B2 adjective /ˌʌnˈnoʊ.tɪst/

Unnoticed

未被注意到; 被忽视

Meaning

not seen or observed; ignored

Example

His hard work went unnoticed by his manager.

他的辛勤工作没有被经理注意到。

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。

B1 adjective /ʌnˈʃʊr/

unsure

不确定的

Meaning

not certain or confident; feeling doubt

Example

She felt unsure about the decision.

她对这个决定感到不确定。

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。

B2 adjective /ʌnˌkənˈdɪʃ.ən.əl/

Unconditional

无条件的

Meaning

not subject to any conditions; complete and absolute

Example

She offered her unconditional support to her friend in need.

她在朋友需要时提供了无条件的支持。

C1 adjective /ˌʌnrɪˈfaɪnd/

unrefined

未精炼的

Meaning

not processed or purified; lacking polish or sophistication

Example

The unrefined oil must be processed before it can be used as fuel.

未精炼的石油在用作燃料之前必须进行加工。

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。

C2 adjective /ʌnˈælɔɪd/

unalloyed

纯净

Meaning

Pure, complete, and not mixed with anything else.

Example

She felt unalloyed joy at the news of her success.

她听到成功的消息时感到纯粹的喜悦。

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。

A2 noun /ˈʌndərweər/

underwear

内衣

Meaning

Clothing worn beneath outer clothes, typically next to the skin.

Example

He bought new underwear for the trip.

他为旅行买了新的内衣。

A2 adjective /ʌnˈhæp.i/

Unhappy

不快乐; 难过

Meaning

not happy; feeling sad or displeased; unfortunate or undesirable

Example

He was unhappy with the results of his exam.

他对考试结果感到不满。

B2 adverb /ʌnˈkaɪndli/

unkindly

残忍地

Meaning

in a cruel, harsh, or unsympathetic manner

Example

She spoke unkindly about her colleague during the meeting.

她在会议期间残忍地谈论了她的同事。

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。

C1 noun ˈʌp.raɪ.zɪŋ

uprising

起义

Meaning

An act of resistance or rebellion; a revolt against an authority or government.

Example

The uprising marked the beginning of the revolution.

起义标志着革命的开始。

B2 adjective /ʌnˈɡreɪt.fəl/

Ungrateful

忘恩负义

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.

她觉得他对她给予的所有帮助都忘恩负义。

C1 noun /juːnəˈnɪməti/

Unanimity

一致性

Meaning

complete agreement among all members of a group

Example

The committee reached unanimity on the new policy.

委员会在新政策上达成了一致意见。

C2 adjective /ˌʌnsɛrəˈmoʊniəs/

unceremonious

不拘礼节/粗鲁

Meaning

Done without formality or courtesy; abrupt or rude.

Example

He made an unceremonious exit from the party.

他从派对上不拘礼节地离开。

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 /ˌʌnsəˈfɪstɪˌkeɪtɪd/

unsophisticated

不复杂

Meaning

Lacking worldly experience, refinement, or complexity.

Example

The villagers led an unsophisticated but happy life.

村民过着简单而幸福的生活。

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。

A1 preposition /ˈʌndər/

under

下

Meaning

in or to a lower position than something

Example

The cat is under the table.

猫在桌子下面。

C1 adjective /ʌnˈɒnəd/

unhonoured

未受尊敬的

Meaning

not respected or given the recognition that is deserved; treated without honor

Example

He felt unhonoured after his years of service were ignored.

他的多年服务被忽视后，他感到自己未受尊敬。

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。

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。

A2 adjective /ʌnˈtaɪdi/

Untidy

凌乱的; 无序的;

Meaning

not neat or orderly; messy and disorganized

Example

Her untidy room was filled with clothes scattered everywhere.

她凌乱的房间充满了四处散落的衣服。

B1 adverb /ˌʌpsaɪd ˈdaʊn/

Upside-down

倒过来

Meaning

with the upper part at the bottom; in or into a reversed position

Example

The picture was hanging upside-down on the wall.

图片倒挂在墙上。

B2 verb /ɜːrdʒ/

urge

催促

Meaning

to strongly encourage or try to persuade someone to do something

Example

Doctors urge patients to exercise regularly.

医生鼓励病人定期锻炼。

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。

B2 adjective /ˌʌn.əkˈsep.tə.bəl/

Unacceptable

不可接受

Meaning

not satisfactory or allowable; not acceptable

Example

The quality of work was completely unacceptable.

工作质量完全不可接受。

B2 adjective /ʌnˈprɒf.ɪ.tə.bl̩/

Unprofitable

无利可图

Meaning

not yielding profit or gain; not producing financial benefit

Example

The unprofitable business was forced to close down after three years.

这个无利可图的生意在三年后被迫关闭。

B2 adjective /ˈjuː.nɪ.faɪd/

unified

统一

Meaning

Made into a whole or joined together.

Example

A unified approach fosters better outcomes.

统一的方法促进了更好的结果。

B2 adjective /ʌnəˈfreɪd/

unafraid

无畏

Meaning

Not feeling fear; brave or courageous

Example

She walked into the dark room, unafraid of what might be inside.

她走进黑暗的房间，无畏里面可能有什么。

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。

C1 noun /ˈʌp.rɔːr/

Uproar

骚动; 喧嚣; 混乱

Meaning

a loud and emotional noise or disturbance; public outcry

Example

The announcement caused an uproar among the students.

公告在学生中引起了骚动。

C1 adjective /ˌʌnɪˈkwɪvəkəl/

unequivocal

明确

Meaning

Leaving no doubt; clear and unambiguous

Example

She gave an unequivocal answer to the question.

她对问题给出了明确的回答。

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。

C1 adjective /ˌʌnəbˈtruːsɪv/

unobtrusive

不引人注目

Meaning

not attracting attention; blending in without causing notice

Example

The security cameras are designed to be unobtrusive.

安全摄像头被设计成不引人注目。

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。

C2 adjective /ʌnˈwiːldi/

unwieldy

笨重

Meaning

Difficult to carry or move because of its size, shape, or weight.

Example

The box was too unwieldy to carry up the stairs.

这个盒子太笨重了，无法把它提上楼梯。

B2 adjective /ˌʌnrɪˈlaɪəbl/

Unreliable

不可靠的; 不能被信任或依赖

Meaning

not dependable; not able to be trusted or relied upon

Example

The old car is unreliable and breaks down frequently.

这辆老车不可靠，常常坏掉。

C1 noun /ˈʌndərˌstʌdi/

understudy

替身演员

Meaning

An actor who learns another's role to act as a replacement if needed.

Example

The understudy performed when the lead actor fell ill.

当主角生病时，替身演员上场表演。

C2 adjective /ˌʌnəˈsweɪdʒd/

unassuaged

未缓解

Meaning

Not made less intense or relieved; unrelieved.

Example

His grief remained unassuaged despite the passage of time.

他的痛苦尽管时间流逝依然未缓解。

C1 noun /ˈʌp.raɪt.nəs/

Uprightness

正直; 正义

Meaning

the quality of being honest and morally correct; integrity

Example

His uprightness in business dealings earned him great respect.

他在商业中的正直赢得了很大的尊重。

B2 adjective /ʌnˌkənˈfɜːmd/

Unconfirmed

未确认; 未验证;

Meaning

not confirmed as true or definite; not verified or substantiated

Example

The report remains unconfirmed until we receive official verification.

报告在我们收到官方验证之前保持未确认状态。

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。