infamy
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C2 noun /ˈɪnfəmi/

infamy

幸福
Meaning
the state of being well known for some bad quality or deed
Example
His name will live in infamy for the crimes he committed.
她在收到奖项时无法掩饰她的幸福。
C1 noun /ɪˈmɜː.ʃən/

immersion

沉浸
Meaning
Complete engagement in an environment or experience.
Example
Immersion in VR games makes users feel like they are inside the virtual world.
沉浸在虚拟现实游戏中让用户感觉自己仿佛置身于虚拟世界。
B2 adjective /ɪˈmætʃʊr/

Immature

不成熟; 未完全发展; 幼稚
Meaning
not fully developed; lacking emotional or intellectual development; childish
Example
His immature behavior during the meeting disappointed everyone.
他在会议中的不成熟行为让大家都很失望。
C2 adjective /ˌɪnæprɪˈhɛnsəbl/

inapprehensible

难以理解
Meaning
not understandable; incomprehensible
Example
The concept was so abstract that it seemed inapprehensible to most students.
这个概念如此抽象，以至于它对大多数学生来说是不可理解的。
C1 adverb /ˌɪn.ədˈvɜːr.tənt.li/

Inadvertently

无意中; 不小心; 错误地
Meaning
without being aware of what you are doing; unintentionally; by mistake
Example
She inadvertently deleted the important file while cleaning her computer.
她在清理计算机时无意中删除了重要文件。
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 /ɪnˈɛksərəbl/

inexorable

不可阻挡
Meaning
Impossible to stop or prevent; relentless.
Example
The inexorable rise of technology is changing every aspect of life.
技术的不可阻挡的崛起正在改变生活的方方面面。
C1 adjective /ɪˈmækjələt/

immaculate

完美无瑕
Meaning
perfectly clean, neat, or free from flaws
Example
Her room was immaculate, with everything in its place.
她的房间完美无瑕，一切都井井有条。
A2 noun /ˈɪndʒəri/

injury

伤害
Meaning
Harm or damage to a person’s body caused by an accident or attack.
Example
He suffered a serious injury during the football match.
他在足球比赛中受了重伤。
C2 noun /ˈɪnˌɡreɪt/

ingrate

Meaning
An ungrateful person; someone who shows no appreciation.
Example
He worked hard for his friend, but the ingrate never thanked him.
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。
B1 adverb /ɪnˈkriːsɪŋli/

increasingly

越来越多
Meaning
more and more over time
Example
People are increasingly concerned about climate change.
人们对气候变化的关注越来越多。
C2 adjective /ɪnˈdɛkərəs/

indecorous

不得体
Meaning
Not in keeping with good taste and propriety; improper.
Example
His indecorous behavior shocked the audience.
他的不得体行为让观众震惊。
C1 noun /ˈɪntrɪkəsi/

intricacy

复杂性
Meaning
the quality of being very detailed or complicated
Example
The intricacy of the design impressed everyone.
设计的复杂性给每个人留下了深刻印象。
B2 noun ˈɪnər strɛŋkθ

inner strength

内在力量
Meaning
Mental or spiritual power that helps a person cope with difficulties.
Example
Community service fosters inner strength in individuals.
社区服务促进了个人的内在力量。
C2 adjective /ˌɪntərˈlɒkjətəri/

interlocutory

临时的
Meaning
Given during the course of a legal action, not final but temporary or provisional.
Example
The judge issued an interlocutory order to maintain the status quo until the hearing.
法官发布了临时命令，以保持听证会之前的现状。
C1 adjective ɪnɪɡˈzɔːstɪbəl

inexhaustible

取之不尽
Meaning
Unable to be used up or worn out; limitless.
Example
His inexhaustible energy allowed him to work tirelessly on his projects.
他那取之不尽的精力使他能够在项目上不知疲倦地工作。
B2 adjective /ɪnˈtɛns/

intense

强烈
Meaning
Of extreme force, degree, or strength.
Example
She felt intense pain after the accident.
她在事故后感到剧烈的疼痛。
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。
C1 verb /ˈɪmprəvaɪz/

improvise

Meaning
To create or perform something spontaneously without preparation.
Example
The actor had to improvise his lines when he forgot the script.
C1 adjective /ɪnˈvɜːs/

Inverse

相反的；反向的
Meaning
opposite in order, nature, or effect; reversed
Example
There is an inverse relationship between price and demand.
价格和需求之间存在逆向关系。
C1 adjective, noun /ɪnˈdɪkətɪv/

indicative

指示性
Meaning
Serving as a sign or expression of something; in grammar, a mood used to make factual statements.
Example
His tone was indicative of his frustration.
他的语气表明了他的沮丧。
C2 adjective /ˈɪnˌbrɛd/

inbred

天生的
Meaning
existing naturally in a person or animal; also related to reproduction within a limited community
Example
He has an inbred sense of loyalty.
他有天生的忠诚感。
C1 adverb /ˈɪnwərdli/

inwardly

内心
Meaning
In the mind or spirit; not outwardly visible.
Example
She smiled outwardly but inwardly she was worried.
她外表微笑，但内心却感到担忧。
B2 noun /aɪˈdiː/

id

身份证件
Meaning
identification; a document or number used to prove who someone is
Example
Please show your ID at the entrance.
请在入口处出示你的身份证件。
B1 adjective /ɪmˈpruːvd/

improved

改进的
Meaning
made better or enhanced in quality or condition
Example
Her health has significantly improved since last month.
她的健康自上个月以来显著改善。
C1 adjective ɪmˈpɛkəbl

impeccable

完美无瑕
Meaning
In accordance with the highest standards; faultless.
Example
His impeccable taste in fashion was admired by all his peers.
他的完美品味在时尚界得到了所有同事的赞赏。
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。
C1 adjective /ˌɪnɪkˈskjuːzəbl/

inexcusable

不可原谅的
Meaning
Too bad to be justified or overlooked; unforgivable.
Example
His rude behavior was inexcusable.
他的粗鲁行为是不可原谅的。
C2 adjective /ˌɪrɪˈdɛsənt/

iridescent

彩虹色
Meaning
showing luminous colors that seem to change when seen from different angles
Example
She wore an iridescent dress that sparkled in the light.
她穿了一件在光线下闪闪发光的彩虹色裙子。
C2 verb /ˌɪn.trəˈmɪt/

intromit

引入
Meaning
To insert or introduce something into a place or body.
Example
The doctor carefully intromitted the instrument into the wound.
医生小心地将仪器引入伤口。
C1 adjective /ˌɪntərˈtwaɪnd/

intertwined

幸福
Meaning
closely connected or twisted together
Example
Their lives became deeply intertwined after the accident.
当她获得奖项时，她无法掩饰自己的幸福。
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 /ˌɪn.trəˈdʌk.ʃən/

introduction

引言
Meaning
the action of introducing something or someone; an opening or beginning part
Example
The professor gave a brief introduction before starting the lecture.
教授在开始讲座之前做了简短的引言。
C2 adjective /ɪnˈdjuːbɪtəbl/

indubitable

无可置疑
Meaning
Impossible to doubt; unquestionable.
Example
It is indubitable that hard work leads to success.
毫无疑问，努力工作会带来成功。
C1 noun /ˌɪnkjʊˈbeɪʃən/

incubation

将蛋、细胞或生物置于适宜的环境条件中以促进其发展的过程
Meaning
the process of keeping eggs, cells, or organisms in the right conditions for development
Example
The incubation of the eggs lasted for three weeks.
蛋的孵化持续了三周。
C2 verb /ˈɪŋkʌlpeɪt/

inculpate

指责
Meaning
To blame or accuse someone of wrongdoing.
Example
The evidence seemed to inculpate the suspect in the crime.
证据似乎将嫌疑犯牵连到这起犯罪中。
C2 adjective /ɪmˈpɪəriəs/

imperious

专横
Meaning
Arrogantly domineering or overbearing.
Example
Her imperious tone made it hard for others to argue.
她那种专横的语气让其他人很难反驳。
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。
C2 noun /ˌɪmpjuˈteɪʃən/

imputation

指控
Meaning
an accusation or attribution of blame
Example
The politician denied the imputation of corruption.
政治家否认了腐败的指控。
C2 noun /ˌɪntərˈrɛɡnəm/

interregnum

过渡期
Meaning
A period between rulers or governments when normal leadership is suspended.
Example
The country faced instability during the interregnum after the king’s death.
在国王去世后的过渡期，该国经历了不稳定。
C2 noun /ˌɪnvəˈkeɪʃən/

invocation

祈求
Meaning
the act of calling upon a higher power for help, blessing, or inspiration
Example
The ceremony began with an invocation to the gods.
仪式以对神的祈求开始。
C2 adjective /ˈɪn.dɪ.dʒənt/

indigent

贫困
Meaning
lacking the necessities of life due to poverty; very poor
Example
The hospital offers free care to indigent patients.
医院为贫困患者提供免费护理。
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 verb /ɪnˈfleɪt/

inflate

充气；抬高
Meaning
to fill with air or gas so it expands; to increase excessively or artificially
Example
The mechanic inflated the tire to the correct pressure.
技工把轮胎充到了正确的气压。
B2 noun /ˌɪm.ɪˈteɪ.ʃən/

Imitation

模仿; 复制; 仿制品
Meaning
the action of using someone or something as a model; a copy of something original
Example
His imitation of the famous actor was so good that everyone burst into laughter.
他的模仿非常成功，大家都笑了出来。
C1 noun /ˈɪntərˌluːd/

interlude

插曲
Meaning
A short period of time that comes between two events; an interval.
Example
There was a brief musical interlude between the two acts of the play.
在剧本的两个场景之间有一个简短的音乐插曲。
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。
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。
C1 adjective /ˌɪnɔːrˈɡænɪk/

inorganic

无机的
Meaning
relating to substances that are not derived from living organisms; lacking organic structure or growth
Example
Inorganic compounds are commonly studied in chemistry labs.
无机化合物是化学的重要部分。
C1 noun ˌɪntədɪˈpɛndənsi

interdependency

相互依存
Meaning
The dependence of two or more people or things on each other.
Example
The interdependency of the countries led to greater cooperation.
各国之间的相互依存促进了更大的合作。
B2 noun /ɪnˈfɪnɪti/

infinity

无限
Meaning
A concept describing something without any limit or end.
Example
The universe seems to stretch into infinity.
宇宙似乎无限延伸。
C1 noun /ˈɪtʃ.i.nəs/

itchiness

痒
Meaning
The quality or condition of feeling an irritating sensation on the skin that causes a desire to scratch.
Example
Eye itchiness often leads to rubbing.
眼睛的痒感常常导致揉搓。
C1 noun /ˌɪn.dʒəˈnjuː.ɪ.ti/

ingenuity

独创性
Meaning
The quality of being clever, original, and inventive.
Example
His ingenuity led to groundbreaking innovations.
他的独创性导致了开创性的创新。
C1 adjective /ˌɪn.səˈbɔːr.dɪ.nət/

insubordinate

不服从
Meaning
Defiant of authority; disobedient to orders.
Example
The insubordinate employee refused to follow the manager's instructions.
不服从的员工拒绝遵循经理的指示。
C2 adjective /ɪˈræsɪbl/

irascible

易怒的
Meaning
Easily angered; quick-tempered.
Example
His irascible nature often got him into trouble.
他易怒的性格常常使他陷入麻烦。
C2 noun /ɪnˈtræn.sɪ.dʒəns/

intransigence

固执
Meaning
Refusal to change one's views or to agree about something.
Example
The negotiations failed due to the intransigence of both parties.
由于双方的固执，谈判失败了。
C2 adverb /ˈɪntʃmiːl/

inchmeal

逐渐
Meaning
Gradually, little by little.
Example
The old castle fell inchmeal into ruin.
那座古老的城堡逐渐变成废墟。
C1 noun /ɪnˈvɜːrʒən/

inversion

倒置
Meaning
A reversal of the normal order, position, or relationship.
Example
In poetry, inversion is often used to create emphasis.
在诗歌中，倒置常用来创造强调。
B1 noun ˈɪmpækt

impact

影响
Meaning
A strong effect or influence; the action of one object coming forcibly into contact with another.
Example
The decision had great impact.
这个决定产生了巨大影响。
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。
B2 adjective /ˌɪnkəmˈpliːt/

incomplete

不完整
Meaning
Not finished, lacking some parts or not whole.
Example
Her report was incomplete and needed further details.
她的报告不完整，需要更多细节。
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。
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。
B2 noun /ɪnˈhæbɪtənt/

inhabitant

居民
Meaning
a person or animal that lives in a particular place
Example
The inhabitants of the village rely on farming for their livelihood.
村庄的居民依靠农业为生。
C1 verb /ɪnˈtɪmɪdeɪt/

intimidate

Meaning
To frighten or overawe someone, especially to make them do what one wants.
Example
The bully tried to intimidate the smaller kids.
C2 noun /aɪˈoʊtə/

iota

极小的数量
Meaning
An extremely small amount.
Example
He did not show an iota of fear.
他一点儿恐惧都没表现出来。
C1 adjective /aɪˈdɪlɪk/

idyllic

田园诗般的美丽
Meaning
Like an idyll; extremely happy, peaceful, or picturesque.
Example
They enjoyed an idyllic vacation by the sea.
他们享受了一个田园诗般的海边假期。
C2 noun /ɪˈnænɪti/

inanity

荒谬, 愚蠢
Meaning
a nonsensical remark or action; silliness; emptiness
Example
The speech was full of inanities that bored the audience.
演讲充满了让观众感到无聊的荒谬言论。
A2 verb /ɪnˈkluːd/

include

包括
Meaning
to have as part of a whole; to contain or comprise
Example
The price includes all taxes.
价格包含所有税费。
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 /ˌɪntərˌɒpərəˈbɪləti/

interoperability

互操作性
Meaning
The ability of computer systems or software to exchange and make use of information.
Example
The interoperability of different software systems ensures seamless workflow.
不同软件系统的互操作性确保了无缝的工作流程。
B2 adjective /ɪˈreɡjələr/

irregular

不规则的
Meaning
not even or consistent in shape, pattern, time, or behavior; not following normal rules
Example
His attendance at work has been irregular this month.
他这个月上班出勤不规则。
B1 noun /ɪnˈstrʌkʃənz/

instructions

指示
Meaning
Detailed information on how something should be done or operated.
Example
Please follow the instructions on the box.
请按照盒子上的指示操作。
C2 verb ˈɪn.kʌl.keɪt

inculcate

灌输
Meaning
Instill an attitude, idea, or habit by persistent instruction; to teach and impress by frequent repetitions.
Example
Parents should inculcate good values in their children.
父母应该灌输良好的价值观给孩子们。
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。
B2 adjective /ɪnˈtɒlərənt/

intolerant

不宽容
Meaning
unwilling to accept or respect beliefs or behavior different from one's own
Example
He is intolerant of any opinion that differs from his own.
他不能容忍与自己意见不同的任何观点。
B2 noun /ˈɪdɪət/

idiot

白痴
Meaning
a person who acts in a way that is considered very stupid or foolish
Example
He acted like an idiot at the party last night.
他昨晚在派对上像个白痴一样表现。
B2 adjective + noun aɪˈdiːəl ɪnˈvaɪrənmənt

ideal environment

理想环境
Meaning
Perfect or most suitable conditions for growth or development
Example
Winter creates an ideal environment for vegetable growth.
冬天为蔬菜生长创造了理想的环境。
A1 conjunction /ɪf/

if

如果
Meaning
used to introduce a condition or supposition
Example
If it rains tomorrow, we will stay home.
如果明天下雨，我们就待在家里。
C2 noun /ˌɪmprɪˈmɑːtər/

imprimatur

批准书
Meaning
An official license or approval, especially to publish a book.
Example
The book was released with the official imprimatur of the church.
这本书以教会的正式批准书发布。
B2 adjective /ɪˈmædʒ.ɪ.nər.i/

Imaginary

想象的; 虚构的; 不现实的
Meaning
existing only in imagination; not real; fictional
Example
The child had an imaginary friend who she talked to every day.
那个孩子有一个想象的朋友，每天和他说话。
C1 verb /ɪnˈfleɪm/

inflame

激起
Meaning
to arouse strong feelings or provoke anger; to cause inflammation in the body
Example
The politician's remarks served to inflame public opinion.
政治家的言论激起了公众舆论的愤怒。
C1 verb /ɪnˈfrɪndʒ/

infringe

侵犯
Meaning
To actively break the terms of a law, agreement, or right.
Example
Copying this software without permission will infringe copyright laws.
未經許可複製此軟件將侵犯版權法。
C1 noun /ˈɪŋ.krə.mənt/

Increment

增加
Meaning
an increase or addition, especially one of a series on a fixed scale; a regular increase in salary
Example
He received an annual increment of five percent in his salary this year.
他今年获得了五个百分点的年终增加。
B1 noun /ɪnˈɡriːdiənt/

ingredient

成分
Meaning
A component part or element of something, especially in a recipe.
Example
Flour is a key ingredient in baking bread.
面粉是做面包的关键成分。
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 adjective /ɪˈrɪˌspɑn.sə.bəl/

Irresponsible

不负责任
Meaning
lacking a sense of responsibility; careless
Example
It was irresponsible of him to leave without telling anyone.
他在没有告诉任何人就离开，这是不负责任的行为。
C1 noun /ˈɪn.fən.tri/

Infantry

步兵
Meaning
soldiers marching or fighting on foot; foot soldiers collectively
Example
The infantry advanced across the battlefield on foot.
步兵在战场上走路前进。
C2 noun /ˌɪntərˈlɒkjətər/

interlocutor

对话者
Meaning
a person who takes part in a conversation or dialogue
Example
She was a skilled interlocutor during the debate.
她在辩论中是一个熟练的对话者。
C2 adjective /ˌɪnkəˈməʊdiəs/

incommodious

不舒服的
Meaning
Uncomfortably small, cramped, or inconvenient.
Example
We had to stay in an incommodious room during the trip.
我们在旅行期间不得不住在一个不舒服的房间里。
C2 verb /ɪmˈpjuːt/

impute

归因于
Meaning
to attribute a fault or responsibility to someone
Example
They imputed the company's success to good leadership.
他们将公司的成功归功于出色的领导力。
C2 adjective /ɪˈrɛzəluːt/

irresolute

优柔寡断
Meaning
uncertain or indecisive; lacking determination
Example
He stood irresolute at the crossroads, unsure which path to take.
他在十字路口犹豫不决，不知道走哪条路。
C2 verb /ɪˈmjʊər/

immure

囚禁
Meaning
to confine or enclose someone against their will
Example
The prisoner was immured in a dark cell.
囚犯被禁闭在一个黑暗的牢房里。
C2 adjective /ˌɪntəˈrɒɡətəri/

interrogatory

询问的
Meaning
expressed in the form of a question; relating to questioning
Example
The lawyer’s interrogatory tone made the witness uncomfortable.
律师的询问语气让证人感到不舒服。
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。
B1 verb /ɪnˈvɛnt/

invent

发明
Meaning
to create or design something that has not existed before
Example
Thomas Edison invented the electric bulb.
托马斯·爱迪生发明了电灯泡。
C2 noun /ˈaɪdlər/

idler

懒汉
Meaning
A person who avoids work or spends time lazily.
Example
He was known as an idler who wasted his days.
他被称为一个懒汉，浪费了他的日子。
A2 adjective /ɪmˈpɑːsəbl/

impossible

不可能
Meaning
not able to occur, exist, or be done
Example
It is impossible to finish this work in one day.
一天之内完成这项工作是不可能的。
B1 adverb /ɪˈnɪʃəli/

initially

一开始
Meaning
At the beginning; at first.
Example
Initially, he refused the offer but later accepted it.
一开始，他拒绝了这个提议，但后来接受了。
C1 adjective /ɪmˈpæsəbəl/

impassable

无法通行
Meaning
Impossible to travel along or over.
Example
The road became impassable after the heavy snowfall.
这条路在大雪过后变得无法通行。
C2 adjective /ˌɪn.trəˈsɛl.jʊ.lər/

intracellular

细胞内
Meaning
Located or occurring within a cell.
Example
The drug works by targeting intracellular bacteria.
药物通过靶向细胞内的细菌发挥作用。
C1 adjective /ɪnˈflæməˌtɔːri/

inflammatory

幸福
Meaning
causing inflammation in the body; arousing anger, hostility, or strong emotion
Example
His inflammatory speech triggered protests across the city.
她在收到奖项时无法隐藏自己的幸福感。
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。
C2 verb /ɪnˈɡrɑːft/

ingraft

根植
Meaning
To implant or fix deeply, often used in the sense of grafting an idea or quality.
Example
The teacher tried to ingraft good manners in the students.
老师尝试将良好的行为习惯根植于学生们。
B2 adjective ˌɪn.təˈræk.tɪv

interactive

互动的
Meaning
Allowing a two-way flow of information between it and a user, responding to the user's input.
Example
Interactive learning keeps students engaged in lessons.
互动学习保持学生在课堂中的参与感。
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。
C2 noun /ˈɪnroʊd/

inroad

进展
Meaning
An advance or significant progress, often at the expense of something else.
Example
The company made significant inroads into the mobile market.
该公司在移动市场取得了显著进展。
B2 verb /ɪnˈspekt/

inspect

检查
Meaning
to examine something carefully to check for problems or faults
Example
The engineer will inspect the building for structural damage.
工程师将检查建筑物的结构损坏。
C1 adjective /ɪˈnænɪmət/

inanimate

无生命的物体
Meaning
not alive, especially not in the manner of animals and humans; lifeless
Example
The museum was full of inanimate objects from ancient times.
博物馆里充满了来自古代的无生命物体。
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 ɪˈluː.sər.i

illusory

虚幻的
Meaning
Based on illusion; not real although seeming to be.
Example
His sense of security was entirely illusory.
他的安全感完全是虚幻的。
B1 verb /ɪnˈvɑːlv/

involve

涉及
Meaning
to include as a necessary part, or to engage someone in an activity
Example
The project will involve several departments working together.
这个项目将涉及多个部门共同合作。
C1 adjective /ˌɪndɪˈsaɪsɪv/

Indecisive

优柔寡断的
Meaning
unable to make decisions quickly; hesitant; wavering
Example
She was indecisive about which university to attend.
她对要去哪个大学犹豫不决。
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。
C1 adjective /ɪˈlɪsɪt/

illicit

非法的
Meaning
Forbidden by law, rules, or custom.
Example
The police shut down the illicit drug operation.
警方关闭了非法毒品交易。
B2 noun ˌɪn.əˈveɪ.ʃən

innovation

创新
Meaning
The action or process of innovating; a new method, idea, product, etc.
Example
Innovation drives solutions to global challenges.
创新推动了全球挑战的解决方案。
B1 noun /ɪnˈstrʌktər/

instructor

教练
Meaning
A person who teaches a subject or skill.
Example
The driving instructor was very patient with new learners.
驾校教练对新学员非常耐心。
C1 adjective /ɪnˈtrɛpɪd/

intrepid

无畏
Meaning
fearless and adventurous, often used humorously
Example
The intrepid traveler explored the jungle alone.
那个无畏的旅行者独自探险了丛林。
B2 verb ɪmˈpoʊz

imposes

强加
Meaning
To establish or apply by authority; to force something unwelcome or unfamiliar to be accepted or put in place.
Example
Pollution imposes harmful effects on the environment.
污染对环境施加了有害的影响。
C1 adjective /ˌɪnkəmˈpætəbl/

incompatible

不兼容
Meaning
Not able to exist or work together without conflict.
Example
Their personalities were completely incompatible.
他们的个性完全不兼容。