B2 verb ˈɪmplɪmentɪd

implemented

实施

Meaning

Put a decision or plan into effect; carried out or executed.

Example

The master plans were partially implemented.

主要计划已部分实施。

C2 verb /ˌɪntərˈmɪt/

intermit

中断

Meaning

To suspend or stop for a time; to pause intermittently.

Example

The rain would intermit and then start again.

雨会暂停然后再开始。

B1 adjective /ɪnˈfɔːrməl/

Informal

非正式的; 放松的; 随意的

Meaning

relaxed and friendly; not official or ceremonial; casual

Example

The meeting was informal and relaxed.

会议是非正式的且轻松的。

B2 verb /ˈɪnəveɪt/

innovate

创新

Meaning

To introduce new methods, ideas, or products.

Example

The company must innovate to stay ahead of its competitors.

公司必须创新，以保持领先于竞争对手。

C1 noun /ˌɪnkəmˈpliːtnəs/

incompleteness

不完整性

Meaning

the state of not being complete or whole; lack of necessary parts or fullness

Example

The incompleteness of the report caused delays in the project.

报告的不完整性导致了项目延误。

C2 adjective /ˌɪndɪˈfætɪɡəbl̩/

indefatigable

不知疲倦

Meaning

persisting tirelessly; incapable of being fatigued

Example

Her indefatigable spirit kept the team motivated during the long project.

她那不知疲倦的精神在漫长的项目中激励着团队。

B1 verb /ɪnˈfɔ:m/

inform

通知

Meaning

to tell someone about something; to give information

Example

Please inform me when you arrive at the airport.

请在您到达机场时通知我。

A2 adjective /ɪnˈtɛlɪdʒənt/

intelligent

聪明的

Meaning

Having or showing high mental capacity, quick to learn and understand.

Example

She is one of the most intelligent students in the class.

她是班上最聪明的学生之一。

C1 adverb /ɪnˈdɛfɪnətli/

indefinitely

无限期

Meaning

for an unlimited or unspecified period of time

Example

The project has been postponed indefinitely.

该项目已无限期推迟。

C1 adjective /ɪnˈdʌktɪv/

inductive

归纳的

Meaning

characterized by the inference of general laws from particular instances; reasoning from specific cases to general principles

Example

The scientist used inductive reasoning to form a hypothesis.

科学家使用归纳推理来形成假设。

B1 adjective ˈɪnəveɪtɪv

innovative

创新的

Meaning

Featuring new methods; advanced and original

Example

Innovative strategies are required to combat pollution.

创新的战略是解决污染问题的关键。

C2 adjective /ɪmˈpæsɪbəl/

impassible

不可忍受的

Meaning

Incapable of suffering or feeling pain (used mainly in theological or philosophical contexts).

Example

Some philosophers argue that God is impassible and cannot experience human emotions.

一些哲学家认为上帝是不可忍受的，无法体验人类的情感。

C2 adjective /ɪnˈɛstɪməbl/

inestimable

无法估量的

Meaning

Too great or valuable to be measured or estimated.

Example

Her contribution to the project was of inestimable value.

她对项目的贡献具有无法估量的价值。

C2 noun /ɪnˈtɛnʃən/

intension

内涵

Meaning

The internal content of a concept; the set of attributes implied by a word or phrase.

Example

The intension of the word 'dog' includes being a mammal and domesticated.

'狗'这个词的内涵包括是哺乳动物和被驯养。

C1 noun /ˌɪnkənˈsɪstənsi/

inconsistency

不一致

Meaning

The quality of being contradictory, irregular, or not staying the same.

Example

There is an inconsistency between his words and actions.

他的话语和行为之间存在不一致。

B2 adverb /ˌɪndəˈrɛktli/

indirectly

间接地

Meaning

in a way that is not direct; through an intermediate means or influence

Example

The policy affected small businesses indirectly.

该政策间接地影响了小企业。

C1 verb /ɪnˈfjuːz/

infuse

Meaning

to fill or spread through something; to instill a quality, idea, or feeling

Example

The teacher tried to infuse her students with a love for reading.

C2 noun /ɪmˈpɒs.tʃər/

Imposture

冒充; 欺诈; 欺骗

Meaning

the practice of deceiving others by pretending to be someone else; fraudulent deception

Example

The elaborate imposture lasted for months before investigators uncovered the truth.

这个精心设计的欺骗持续了几个月，直到调查员揭露了真相。

C1 verb /ɪnˈskraɪb/

inscribe

铭刻

Meaning

to write or carve words or symbols on a surface

Example

They inscribed her name on the trophy.

他们把她的名字刻在奖杯上。

B1 adjective /ˌɪnɪkˈspɛnsɪv/

Inexpensive

便宜的; 经济实惠的; 负担得起的

Meaning

not costing a lot of money; affordable; budget-friendly

Example

This restaurant offers delicious and inexpensive meals for students.

这家餐厅为学生提供美味且便宜的餐点。

C1 noun /ɪˈnɜː.ʃə/

Inertia

惯性；缺乏活动

Meaning

a tendency to do nothing or remain unchanged; lack of activity or movement

Example

The team's inertia prevented them from adapting to the rapidly changing market conditions.

团队的惯性阻止了他们适应迅速变化的市场条件。

B2 noun /ˌɪnsɪˈkjʊərɪti/

insecurity

不安全感

Meaning

lack of confidence or assurance; a state of uncertainty or vulnerability

Example

Her insecurity made her doubt her abilities despite her experience.

她的不安全感让她怀疑自己的能力。

B2 adjective /ˌɪnsəˈfɪʃənt/

insufficient

不足的

Meaning

Not enough; inadequate.

Example

His explanation was insufficient to clear the confusion.

他的解释不足以清除混乱。

C1 noun /ˌɪmɔːrˈtæləti/

immortality

不朽

Meaning

the state of living forever; eternal life or lasting fame beyond death

Example

Many ancient cultures believed that heroes could achieve immortality through great deeds.

许多古代文化相信英雄可以通过伟大的事迹获得不朽。

A2 noun /ˈɪʃ.uːz/

issues

问题

Meaning

Important topics or problems for debate or discussion.

Example

Health issues from pollution are increasing.

污染带来的健康问题在增加。

C2 adjective /ɪˈlɪmɪtəbl/

illimitable

无限

Meaning

Without limits or bounds.

Example

The universe is often described as illimitable.

宇宙常被描述为无限的。

C2 adjective /ɪnˈskruːtəbl̩/

inscrutable

幸福

Meaning

impossible to understand or interpret

Example

His inscrutable expression made it hard to know what he was thinking.

她收到奖项时无法掩饰自己的幸福。

C1 adjective /ˌaɪdiəˈlɪstɪk/

Idealistic

理想主义的

Meaning

pursuing high principles or ideals; unrealistically optimistic

Example

She has an idealistic view of changing the world.

她对改变世界有着理想主义的看法。

C2 adjective /ˌɪməˈmɔːriəl/

immemorial

古老的

Meaning

Extending back beyond memory or record; ancient.

Example

The tradition has been followed since time immemorial.

这个传统自古以来就被遵循。

C1 verb /ˌɪntəˈsɛkt/

intersect

交叉

Meaning

to cross or pass through each other

Example

The two roads intersect at the city center.

这两条道路在市中心交汇。

C1 noun ˌɪndɪˈspensəbl səˈpɔːrt

indispensable support

不可或缺的支持

Meaning

Essential assistance that cannot be done without; absolutely necessary help.

Example

Volunteers provide indispensable support to communities.

志愿者为社区提供不可或缺的支持。

C1 adjective /ˌɪndɪˈspjuːtəbəl/

Indisputable

不可争辩的; 不容否认的; 确定的

Meaning

impossible to deny or argue against; undeniable; certain

Example

The evidence against him was indisputable.

反对他的证据是不可争辩的。

B2 adjective /ˈɪmpæktfʊl/

impactful

有影响力的

Meaning

Having a major impact or effect; powerful and forceful.

Example

Her impactful speech moved the audience to take action.

她有影响力的演讲促使观众采取行动。

C1 noun /ˈaɪsətəʊp/

isotope

同位素

Meaning

Atoms of the same element with equal number of protons but different numbers of neutrons.

Example

Carbon-14 is a radioactive isotope used in dating fossils.

碳-14 是一种放射性同位素，用于化石的年代测定。

B2 adjective ˈɪn.tɪ.ɡrəl

integral

必要的

Meaning

Necessary to make a complete whole; essential or fundamental.

Example

Exercise is an integral part of a healthy lifestyle.

锻炼是健康生活方式的重要组成部分。

B1 verb /ˈɪndʒər/

injure

伤害

Meaning

to cause physical harm or damage to someone or something

Example

He injured his leg while playing football.

他踢足球时伤了腿。

A2 adjective ˌɪn.təˈnæʃ.ən.əl

international

国际的

Meaning

Existing, occurring, or carried on between two or more nations and their citizens.

Example

International standards improve competitiveness.

国际标准提高竞争力。

C1 noun /ɪmˈpɜː.mə.nəns/

impermanence

无常

Meaning

The state or fact of lasting for only a limited period of time.

Example

The philosophy of Buddhism emphasizes the impermanence of life.

佛教哲学强调生命的无常性。

A2 adjective /ˈɪntrəstɪd/

interested

感兴趣

Meaning

Showing curiosity or concern about something.

Example

She is very interested in learning new languages.

她对学习新语言非常感兴趣。

C1 noun /ɪnˈfɜː.mə.ti/

Infirmity

虚弱；疾病；虚弱

Meaning

physical or mental weakness; a disease or ailment; frailty

Example

Despite his advanced age and various infirmities, he remained mentally sharp and alert.

尽管他年事已高，且有多种病痛，他仍保持着敏捷和警觉。

B1 verb /ˈɪndɪkeɪt/

indicate

指示

Meaning

to point out; to show or suggest; to be a sign of

Example

The red light indicates that you should stop.

红灯表示你应该停下来。

B1 verb /ɪnˈvɛs.tɪ.ɡeɪt/

investigate

调查

Meaning

to carry out a systematic inquiry to discover facts or information

Example

The police will investigate the incident thoroughly.

警方将彻底调查此事件。

C1 noun ˌɪndɪˈspensəbl̩ ˈkɒmpɪtənsi

indispensable competency

不可或缺的能力

Meaning

Essential skill or ability that cannot be done without; a crucial capability that is absolutely necessary.

Example

Digital literacy is an indispensable competency in the 21st century.

数字素养是21世纪不可或缺的能力。

B2 verb ɪnˈvɛst.ɪŋ

investing

投资

Meaning

The act of putting money into financial schemes, shares, property, or a commercial venture with the expectation of achieving a profit.

Example

Investing in stocks can generate long-term wealth.

投资股票可以产生长期财富。

C1 adjective /ˌɪnhɒˈspɪtəbl/

inhospitable

不适宜居住的

Meaning

Harsh and difficult to live in; unfriendly or unwelcoming to guests.

Example

The desert is an inhospitable environment for most plants.

沙漠是大多数植物无法生存的环境。

A2 adjective/noun /ˈɪndiən/

indian

印度的

Meaning

Relating to India, its people, or their culture.

Example

She loves Indian food, especially biryani.

她喜欢印度食物，特别是比尔亚尼。

C2 noun /ˌɪntərˈsɛʃən/

intercession

代祷

Meaning

the act of intervening or pleading on behalf of another person

Example

The prisoner was released due to the intercession of influential leaders.

由于有影响力的领导人的代祷，囚犯被释放了。

C1 adjective /ɪˈmeʒərəbəl/

Immeasurable

不可测量的

Meaning

too large or extensive to measure; boundless

Example

The immeasurable love of a mother knows no bounds.

母亲那无可估量的爱没有边界。

C1 noun /ˈɪn.floʊ/

inflow

流入

Meaning

The movement of things such as money, people, or water into a place.

Example

The inflow of tourists boosted the local economy.

游客的流入促进了当地经济的发展。

C2 verb /ɪnˈdaɪt/

indite

创作

Meaning

To write or compose (literary or formal works).

Example

The poet indited a heartfelt sonnet.

诗人创作了一首真挚的十四行诗。

C1 adjective ɪnˈdʒiː.ni.əs

ingenious

巧妙

Meaning

Showing inventiveness and skill; clever, original, and inventive.

Example

His ingenious ideas transformed modern physics.

他的巧妙想法改变了现代物理学。

C2 noun /ˈɪkθiəˌsɔːrz/

ichthyosaurs

鱼龙（已灭绝的海洋爬行动物）

Meaning

Extinct marine reptiles that resembled fish and dolphins, dominant during the Mesozoic era.

Example

Ichthyosaurs were swift predators of the ancient seas.

鱼龙是古代海洋的迅猛掠食者。

C2 noun /aɪˈdɒlətri/

idolatry

偶像崇拜

Meaning

The worship of idols or extreme admiration for someone or something.

Example

The priest condemned the idolatry practiced in the village.

牧师谴责了在村里实践的偶像崇拜。

A2 noun /ˈaɪtəm/

item

项目

Meaning

A single thing, object, or unit, often part of a list or collection.

Example

Each item on the list must be checked carefully.

列表中的每个项目必须仔细检查。

C2 verb /ɪnˈdɛmnɪfaɪ/

indemnify

Meaning

to compensate someone for harm or loss; to secure against future damage or cost

Example

The insurance company agreed to indemnify the client for the damages.

C1 adjective ˌɪn.təˈdɪs.ɪ.plɪ.nər.i

interdisciplinary

跨学科的

Meaning

Relating to more than one branch of knowledge.

Example

The interdisciplinary approach in education enhances problem-solving skills.

教育中的跨学科方法提高了解决问题的能力。

C2 adjective /ˈɪnfəntaɪl/

infantile

婴儿式

Meaning

characteristic of an infant; childish

Example

His infantile behavior embarrassed everyone at the meeting.

他那种婴儿式的行为让会议上的每个人都感到尴尬。

C2 adjective /ˌaɪdəˈlɑːtrɪəs/

idolatrious

偶像崇拜的

Meaning

Excessively devoted or reverent towards idols or false gods.

Example

The ancient tribe was known for its idolatrious practices.

这个古老的部落因其偶像崇拜的习惯而闻名。

C2 verb /ɪnˈveɪ/

inveigh

严厉批评

Meaning

To speak or write about something with great hostility and criticism.

Example

He inveighed against the corruption in government.

他严厉批评了政府中的腐败。

C1 adjective /ˌɪn.dɪˈspen.sə.bəl/

indispensable

不可或缺

Meaning

Absolutely necessary, essential

Example

Water is indispensable for human survival.

水对人类生存至关重要。

B2 noun /ˌɪnəˈbɪləti/

inability

无能

Meaning

the state of being unable to do something

Example

His inability to make decisions affected his career.

他无法做决定，这影响了他的职业生涯。

C1 noun ˈɪm.pɪ.təs

impetus

推动力

Meaning

The force or motivation that drives something forward; momentum.

Example

The new policy provided an impetus for economic growth.

新政策为经济增长提供了推动力。

C1 adjective /ˌɪnækˈsɛsəbl/

inaccessible

无法接近

Meaning

unable to be reached, entered, or understood

Example

The remote village is almost inaccessible during the rainy season.

这个偏远的村庄在雨季几乎是无法接近的。

C1 noun /ˌɪnækˈtɪvɪti/

inactivity

不活动

Meaning

the state of not being active physically or mentally; lack of action

Example

Prolonged inactivity can negatively affect both physical and mental health.

长期不活动会对身体和心理健康产生负面影响。

C1 adjective /ˌɪnɪkˈsplɪkəbl/

inexplicable

无法解释

Meaning

Impossible to explain or understand.

Example

The sudden disappearance of the file was inexplicable.

文件的突然消失是无法解释的。

B1 noun aɪˈdɛntɪti

identity

身份

Meaning

The fact of being who or what a person or thing is; the characteristics determining who or what a person or thing is.

Example

The day reinforces our national identity.

这一天加强了我们的民族认同。

C2 adjective /ˌɪnˈekspɜːrt/

inexpert

不熟练的

Meaning

not skilled or experienced; lacking expertise

Example

The inexpert handling of the machine caused several mistakes.

对机器的不熟练操作导致了多次错误。

C1 noun/verb /ˈɪmprɪnt/

imprint

印记

Meaning

A mark or impression made by pressure; to establish or fix firmly in someone's mind.

Example

The event left an indelible imprint on the city's history.

这一事件在这座城市的历史上留下了不可磨灭的印记。

C2 adjective /ɪnˈkɑːdʒɪtənt/

incogitant

缺乏思考

Meaning

Lacking thought; inconsiderate or thoughtless.

Example

It was incogitant of him to make such a rude comment.

他做出如此粗鲁的评论是缺乏思考的。

C2 adjective /ˌɪndɪˈsɒljʊbl/

indissoluble

不可分割的

Meaning

Unable to be destroyed, broken, or dissolved.

Example

Marriage was once considered an indissoluble bond.

婚姻曾被视为不可分割的纽带。

C1 adjective /ˌaɪ.di.əˈlɒdʒ.ɪ.kəl/

ideological

意识形态的

Meaning

Relating to or based on a system of ideas or beliefs.

Example

The two parties are divided by deep ideological differences.

这两个党派由于深刻的意识形态分歧而分裂。

C2 adjective /ˈɪl bred/

Ill-bred

无教养的

Meaning

lacking good manners; rude; showing poor upbringing

Example

His ill-bred behavior shocked everyone at the dinner party.

他的无教养行为让晚宴上的每个人都震惊。

C1 adjective /ˈaɪərnˌklæd/

ironclad

铁定的

Meaning

impossible to change, break, or dispute; very strong and firm

Example

The company had an ironclad contract with its suppliers.

公司与其供应商签订了铁定合同。

B1 adjective /ɪnˈkrɛdəbl/

incredible

难以置信的

Meaning

so extraordinary that it is hard to believe; amazing

Example

The view from the mountain was incredible.

从山顶看到的景色难以置信。

B2 noun, verb /ˌɪnkənˈviːniəns/

inconvenience

不便

Meaning

trouble or difficulty caused to someone; to cause trouble or difficulty to someone

Example

We apologize for any inconvenience caused by the delay.

对于延误造成的任何不便，我们深表歉意。

C2 noun /ɪnˈtɛɡ.jʊ.mənt/

integument

外部覆盖物

Meaning

A natural outer covering, such as skin, shell, or rind.

Example

The snake sheds its integument as it grows.

蛇在生长过程中脱掉外部覆盖物。

C1 verb ɪˈnɔː.ɡjə.reɪ.tɪd

inaugurated

开幕

Meaning

Begin or introduce (a system, policy, or period) formally.

Example

The organization was inaugurated officially.

该组织已正式开幕。

B2 noun ˌɪr.ɪˈɡeɪ.ʃən

irrigation

灌溉

Meaning

The artificial application of water to land or soil.

Example

Irrigation systems improve crop yields in dry regions.

灌溉系统提高了干旱地区作物的产量。

C2 verb ˈɪnʌndeɪt

inundate

淹没, 用事情或人淹没某人或某物

Meaning

To flood; overwhelm someone or something with things or people to be dealt with

Example

The company was inundated with requests after the advertisement.

广告后，公司被大量请求淹没。

C1 adjective /ˌɪndɪˈskriːt/

indiscreet

不谨慎

Meaning

Not careful in what one says or does, likely to reveal secrets or offend.

Example

It was indiscreet of him to mention the plan in public.

他在公众场合提到计划是不谨慎的。

C1 adjective /ˌɪnədˈvɜːrtənt/

inadvertent

无意的, 非故意的

Meaning

Not resulting from or achieved through deliberate planning; unintentional.

Example

Her inadvertent mistake caused a delay in the project.

她的无意错误导致了项目的延迟。

A2 noun /ˈɪn.sekt/

Insect

昆虫

Meaning

a small invertebrate animal with six legs and usually one or two pairs of wings

Example

The butterfly is a beautiful insect that flies from flower to flower.

蝴蝶是一种美丽的昆虫，它从一朵花飞到另一朵花。

C2 adjective /ɪnˈkoʊətɪv/

inchoative

初步的

Meaning

relating to the beginning of something; in an initial stage

Example

The poet used inchoative expressions to depict the dawn of creation.

诗人使用了初步的表达方式来描绘创世之初。

B1 verb ɪnˈspaɪər

inspire

激励

Meaning

To fill someone with the urge or ability to do or feel something, especially creative or noble.

Example

Artemis seeks to inspire future generations.

阿尔忒弥斯寻求激励未来的几代人。

A1 preposition /ɪn ˈfrʌnt əv/

in front of

在……前面

Meaning

positioned before or ahead of something; facing or located at the forward side of a person or object

Example

She stood in front of the building.

她站在建筑物前面。

C2 noun /ɪnˈdɛntʃər/

indenture

Meaning

A formal legal agreement, contract, or document, often relating to work or service.

Example

In the 18th century, many workers came under indenture to work overseas.

C2 noun /ˌɪn.təˈvɛn.ʃə.nɪ.zəm/

interventionism

干预主义

Meaning

Government policy of active involvement in economic affairs.

Example

The central bank's interventionism helped stabilize inflation.

中央银行的干预主义帮助稳定了通货膨胀。

B2 noun ɪnˌdʌstrɪəlaɪˈzeɪʃən

industrialization

工业化

Meaning

The development of industries in a country or region on a wide scale.

Example

Industrialization changed the global economy dramatically.

工业化显著改变了全球经济。

C2 noun /ˌɪndɛnˈteɪʃən/

indentation

缩进

Meaning

A space left at the beginning of a line of text; a notch or deep recess on a surface.

Example

The teacher asked the students to use proper indentation in their essays.

老师要求学生在他们的论文中使用正确的缩进。

C1 adjective /ˌɪn.səbˈstæn.ʃəl/

insubstantial

不实的

Meaning

Lacking strength, substance, or solidity.

Example

The evidence provided was insubstantial and unconvincing.

提供的证据是不实的且令人信服。

C1 adverb /ˌɪn.dɪˈskrɪm.ɪ.nət.li/

Indiscriminately

无差别地

Meaning

without making careful distinctions; randomly; without discrimination

Example

The company fired employees indiscriminately without considering their performance.

公司无差别地解雇了员工，没考虑他们的表现。

C1 adjective /ɪmˈpɜːmiəbl/

impermeable

不透水的

Meaning

Not allowing fluid or gas to pass through.

Example

The container is made of impermeable plastic.

这个容器是由不透水的塑料制成的。

C1 adjective /ɪˈnɜːrt/

inert

惰性

Meaning

lacking the ability or strength to move or act; chemically inactive

Example

The patient remained inert on the bed.

病人躺在床上保持不动。

B2 noun /ɪnˈsɪstəns/

insistence

坚持

Meaning

the act of demanding something firmly or repeatedly

Example

At his insistence, we stayed longer.

在他的坚持下，我们待得更久。

C2 noun /ˌɪmprəˈpraɪəti/

impropriety

不当行为

Meaning

Failure to observe standards of honesty or modesty; improper behavior.

Example

The politician was accused of financial impropriety.

该政治家被指控涉及财务不当行为。

B2 adjective /ˌɪnɪˈfɪʃənt/

Inefficient

无效率

Meaning

not achieving maximum productivity; wasteful of time or resources

Example

The old computer system was inefficient and wasted a lot of time.

老旧的计算机系统效率低，浪费了很多时间。

C2 noun /ɪnˈsɪpiəns/

incipience

开始

Meaning

the beginning or initial stage of something

Example

The project was still in its incipience when funding was approved.

当资金获得批准时，项目仍处于其开始阶段。

C2 noun /ˌɪkθiˈɒlədʒɪst/

ichthyologist

鱼类学家

Meaning

A scientist who studies fish.

Example

The ichthyologist discovered a new species of fish in the river.

鱼类学家在河里发现了一种新的鱼类。

A2 adverb /ɪnˈstɛd/

instead

代替

Meaning

As an alternative or substitute.

Example

She didn’t buy the dress; instead, she chose a pair of shoes.

她没有买那件裙子; 反而她选择了一双鞋子。

C1 verb /ɪmˈpɛl/

impel

Meaning

to drive, force, or urge someone to do something

Example

Her curiosity impelled her to open the mysterious box.

C1 adjective /ɪnˈstɪŋk.tɪv/

instinctive

本能的, 自然的, 自动的

Meaning

Based on instinct; done without conscious thought; natural and automatic.

Example

His instinctive reaction saved his life.

他的本能反应救了他的生命。

C2 noun /ˌɪrɪˈdɛsəns/

iridescence

虹彩光泽

Meaning

a play of lustrous, changing colors like those of a rainbow

Example

The butterfly's wings shimmered with iridescence.

蝴蝶的翅膀闪耀着虹彩光泽。

C1 verb ɪˈmɜːrs

immerse

沉浸

Meaning

To involve oneself deeply in a particular activity or interest; to surround completely.

Example

Immerse yourself in the new language.

沉浸在新的语言中。

C1 adjective /ɪnˈfriːkwənt/

infrequent

不频繁

Meaning

Happening rarely or not often.

Example

He made infrequent visits to his hometown after moving abroad.

他在搬到国外后，偶尔才回家乡。

A2 verb /ɪnˈvaɪt/

invite

邀请

Meaning

to ask someone to come to an event or to do something

Example

We should invite all our friends to the party.

我们应该邀请所有朋友参加聚会。

C2 verb /ˈɪndjʊˌreɪt/

indurate

使坚硬

Meaning

To harden or make something physically or emotionally tough.

Example

Years of hardship indurated his spirit.

多年的艰辛使他的精神变得坚韧。

C1 adjective /ˌɪndɪˈstrʌktəbl/

indestructible

无法摧毁

Meaning

Impossible to destroy or break.

Example

The superhero's shield was said to be indestructible.

有人说超级英雄的盾牌是无法摧毁的。

B2 noun /ˈɪnstɪŋkt/

instinct

本能

Meaning

A natural way of behaving or reacting that does not require learning.

Example

Birds build nests by instinct.

鸟类本能地筑巢。

B2 adjective ɪnˈev.ɪ.tə.bəl

inevitable

不可避免的

Meaning

Certain to happen; unavoidable.

Example

Death is an inevitable part of life.

死亡是生命中不可避免的一部分。

C2 verb /ɪnˈhjuːm/

inhume

埋葬

Meaning

to bury a dead body in the ground

Example

They inhumed the warrior with full honors.

他们用全部荣誉埋葬了战士。

C2 adjective /ɪˈmɪsəbl/

immiscible

不相溶

Meaning

Describes liquids that do not mix together.

Example

Oil and water are immiscible liquids.

油和水是无法混合的液体。

B2 noun /aɪˌdɛntɪfɪˈkeɪʃən/

identification

身份识别

Meaning

the process of recognizing or proving who or what someone or something is

Example

You need proper identification to enter the building.

您需要适当的身份证明才能进入大楼。

B2 noun /ɪnˈtɒlərəns/

intolerance

不容忍

Meaning

unwillingness to accept or endure beliefs, behaviors, or conditions different from one's own

Example

The leader was criticized for his intolerance toward other religions.

领导人因对其他宗教的不容忍而受到批评。

C1 noun /ɪˌreɡjəˈlærɪti/

irregularity

不规则性

Meaning

lack of regularity or consistency; a deviation from what is normal, expected, or orderly

Example

The audit revealed several financial irregularities in the company’s records.

审计发现该公司的记录中存在多项财务不规则性。

C1 noun /ɪnˈkɒmpɪtəns/

incompetence

不称职

Meaning

Lack of ability, skill, or effectiveness in doing something.

Example

The project failed due to the manager’s incompetence.

由于经理的不称职，项目失败了。

C2 noun /ˌɪlɪbəˈræləti/

illiberality

不宽容

Meaning

The quality of being illiberal; lack of tolerance or generosity.

Example

The illiberality of the new laws alarmed the citizens.

新法律的不宽容让市民感到警觉。

C1 noun /ɪnˈsæn.ə.ti/

Insanity

疯狂; 精神错乱

Meaning

the state of being seriously mentally ill; extreme foolishness or irrationality

Example

The defense lawyer argued that his client was not guilty by reason of insanity.

辩护律师辩称，他的客户因精神错乱而不应被判有罪。

C1 adjective /ɪnˈæk.tɪv/

Inactive

不活跃的

Meaning

not active; not working; dormant; idle

Example

The volcano has been inactive for over a century.

这座火山已休眠超过一个世纪。

B2 noun /ɪnˈvɛstɪˌɡeɪtər/

investigator

幸福

Meaning

a person who carries out a formal inquiry or investigation

Example

The investigator gathered evidence from the crime scene.

当她获得奖项时，她无法掩饰自己的幸福。

B2 noun /ɪnˈveɪʒən/

invasion

入侵

Meaning

An instance of invading a country, region, or personal space with armed force or unwelcome presence.

Example

The army prepared for the possibility of an invasion.

军队为可能的入侵做了准备。

C1 noun /ˌɪm.pəˈzɪʃ.ən/

Imposition

强加; 负担; 不公平的要求

Meaning

the action or process of imposing something or of being imposed; an unfair burden or demand

Example

The imposition of new taxes without consultation angered the citizens greatly.

未经咨询强加的新税让市民极为愤怒。