inwardly
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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。
C1 adjective ɪnˈsaɪ.sɪv

incisive

尖锐
Meaning
Intelligently analytical and clear-thinking; showing clear thought and good understanding of what is important.
Example
His incisive comments revealed the core issues.
他的尖锐评论揭示了核心问题。
C1 adjective /ˌɪnədˈvaɪzəbl/

inadvisable

不建议
Meaning
Not recommended; likely to have undesirable consequences.
Example
It is inadvisable to drive in such heavy rain.
在这种大雨中开车是不建议的。
C1 noun ˌɪn.fɪlˈtreɪ.ʃən

infiltration

渗透，秘密进入
Meaning
The process of entering or gaining access to an organization or place surreptitiously.
Example
Cybersecurity prevents infiltration into sensitive data.
网络安全防止了对敏感数据的渗透。
C1 adjective, noun /ˈɪnvəlɪd/ (adjective), /ɪnˈvælɪd/ (noun)

invalid

无效的
Meaning
Not valid; having no force or effect. Also refers to a person too weak or ill to care for themselves.
Example
The court declared the contract invalid.
法院宣布合同无效。
C1 adjective /ɪˈlɒdʒ.ɪ.kəl/

Illogical

不合逻辑的
Meaning
not reasonable or sensible; lacking logic
Example
It would be illogical to go swimming in such cold weather.
在这么冷的天气下游泳是不合逻辑的。
C1 adjective ɪn ˈfleɪ.ʃə.ner.i

inflationary

通货膨胀的
Meaning
Characterized by or tending to cause monetary inflation; relating to rising prices.
Example
The government took measures to control inflationary pressures.
政府采取了措施来控制通货膨胀的压力。
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 verb /ɪnˈhɪbɪt/

inhibit

抑制
Meaning
to prevent or restrain someone or something from acting freely; to hinder
Example
Fear can inhibit personal growth.
恐惧可能会抑制个人成长。
C1 noun /ˌɪrɪˌspɒnsəˈbɪləti/

irresponsibility

不负责任
Meaning
lack of responsibility or accountability; failure to act in a reliable or sensible way
Example
The accident was caused by his irresponsibility at work.
事故是由于他在工作中的不负责任造成的。
C1 adjective ɪnˈtrɪn.zɪk

intrinsic

内在的, 本质的, 自然的
Meaning
Belonging naturally; essential. Existing as a natural or basic part of something.
Example
Creativity is an intrinsic quality of a great artist.
创造力是伟大艺术家的内在品质。
C1 verb /ɪnˈdaɪt/

indict

起诉
Meaning
to formally accuse someone of committing a serious crime
Example
The grand jury decided to indict the politician for corruption.
大陪审团决定控告该政治家腐败。
C1 adjective ˌɪn.trəˈspek.tɪv

introspective

内省的
Meaning
Characterized by or given to introspection; examining one's own thoughts and feelings.
Example
Writers tend to be highly introspective individuals.
作家通常是高度内省的人。
C1 verb /ˌɪnstɪˈtjuːʃənəlaɪz/

institutionalize

制度化
Meaning
to establish something as a formal institution, custom, or practice
Example
The government seeks to institutionalize environmental protection.
政府致力于将环境保护制度化。
C1 noun ˌɪrɪˈvɜːrsəbl ˈdæmɪdʒ

irreversible damage

不可逆的损害
Meaning
Harm or injury that cannot be undone or repaired.
Example
Climate change causes irreversible damage to ecosystems.
气候变化对生态系统造成了不可逆的损害。
C1 noun /aɪˈdiː.ə.lɪ.zəm/

Idealism

理想主义
Meaning
the pursuit of high principles and noble goals; unrealistic pursuit of perfection
Example
His youthful idealism motivated him to join various social justice movements.
他的青春理想主义激励他加入了各种社会公正运动。
C1 adjective /ˌɪnkənˈsiːvəbl̩/

inconceivable

难以想象
Meaning
Impossible to imagine or believe; beyond comprehension.
Example
It seemed inconceivable that she could finish the marathon after such little training.
在如此少的训练之后，她能够完成马拉松，这简直难以想象。
C1 noun /aɪl/

isle

小岛
Meaning
A small island or peninsula, often poetic or literary.
Example
They spent their honeymoon on a beautiful tropical isle.
他们在一个美丽的热带小岛上度过了他们的蜜月。
C1 noun /ˌɪnkɑːrˈneɪʃən/

incarnation

化身
Meaning
the embodiment of a deity, spirit, or quality in a physical form
Example
The monk was considered the incarnation of compassion.
这位僧侣被认为是慈悲的化身。
C1 verb /ɪnˈklaɪn/

incline

倾向
Meaning
to feel willing or favorably disposed toward something; to bend or tilt
Example
She is inclined to agree with the proposal.
她倾向于同意这个提议。
C1 verb /ɪnˈdʌkt/

induct

Meaning
to formally admit someone into a position, organization, or office
Example
She was inducted into the university's honor society.
C1 noun /ˈɪnˌmeɪt/

inmate

囚犯
Meaning
a person confined to an institution such as a prison or hospital
Example
The prison has over a thousand inmates.
监狱里有超过一千名囚犯。
C1 noun /ɪnˈfɜːməri/

infirmary

医务室
Meaning
A hospital or place where the sick or injured are cared for.
Example
The school had an infirmary for minor injuries.
学校为轻微受伤提供了医务室。
C1 noun /ˌɪntɪˈmeɪʃən/

intimation

暗示
Meaning
A subtle or indirect hint or suggestion.
Example
She gave no intimation of her plans.
她没有给出任何关于她计划的暗示。
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。
C1 verb /ɪmˈpɑːrt/

impart

传授
Meaning
to make information known; to bestow or communicate
Example
The teacher imparted valuable knowledge to her students.
老师将宝贵的知识传授给她的学生。
C1 adjective /ɪˈmoʊbəl/

immobile

无法移动
Meaning
unable to move or be moved
Example
After the accident, he was immobile for weeks.
事故发生后，他几周都无法移动。
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。
C1 noun /ˈɪd.i.əm/

idiom

习语
Meaning
A group of words whose meaning is different from the meanings of the individual words.
Example
The idiom 'break the ice' means to start a conversation in a friendly way.
习语 '打破僵局' 意味着以友好的方式开始对话。
C1 noun /ɪˈrɛlɪvənsi/

irrelevancy

无关性
Meaning
the state of being unrelated or unimportant to the matter at hand
Example
The judge dismissed the argument because of its irrelevancy to the case.
法官因该论点与案件无关而将其驳回。
C1 noun /ɪˌluːmɪˈneɪʃən/

illumination

Meaning
the act of lighting something or making something clear
Example
The street was filled with bright illumination from the lamps.
C1 adjective /ˌɪndɪˈskrɪmɪnət/

indiscriminate

不加区分的
Meaning
Done without careful judgment; random or haphazard.
Example
The indiscriminate use of pesticides harms the environment.
滥用杀虫剂对环境造成了伤害。
C1 adjective /ˌɪndɪˈfɛnsəbl̩/

indefensible

无法辩护
Meaning
not able to be protected or justified
Example
The minister’s remarks were considered indefensible by the public.
部长的言论被公众视为无法辩护。
C1 verb /ˈaɪdəlaɪz/

idolize

偶像崇拜
Meaning
To admire or worship someone excessively.
Example
Fans often idolize celebrities for their talent and lifestyle.
粉丝们常常因为他们的才华和生活方式而崇拜名人。
C1 verb /ˌɪntərˈsɛpt/

intercept

Meaning
to stop, catch, or seize something on its way from one place to another
Example
The police intercepted the stolen car before it crossed the border.
C1 adjective /ˌɪndɪˈskraɪbəbəl/

Indescribable

无法形容
Meaning
impossible to describe or express in words; beyond description
Example
The beauty of the sunset was indescribable.
夕阳的美丽是无法形容的。
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。
C1 adjective /ɪnˈdʌstriəs/

industrious

勤奋的
Meaning
Hardworking and diligent in one's duties.
Example
She is an industrious student who always completes her assignments on time.
她是一个勤奋的学生，总是按时完成她的作业。
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.
C1 adjective /ˌɪn.ɪˈfɛk.tʃu.əl/

ineffectual

无效
Meaning
Not producing any or the desired effect; lacking the ability or qualities to achieve a purpose.
Example
The manager’s ineffectual leadership caused the team to lose motivation.
经理无效的领导导致团队失去了动力。
C1 noun /ˈɪn.tə.lekt/

intellect

智力
Meaning
The ability to think, reason, and understand objectively.
Example
Her intellect is admired by all her colleagues.
她的智力受到所有同事的赞赏。
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。
C1 noun/verb /ˈɪnsɛns/

incense

香火 / 激怒
Meaning
a substance burned for its sweet smell (noun); to make very angry (verb)
Example
The smell of incense filled the temple, but his rude words incensed her.
香火的气味充满了寺庙，但他粗鲁的话让她非常生气。
C1 noun /ˌɪn.səˌbɔːr.dɪˈneɪ.ʃən/

insubordination

不服从
Meaning
Defiance of authority; refusal to obey orders.
Example
The soldier was punished for insubordination during the mission.
士兵因在任务中不服从命令而受到惩罚。
C1 noun /ɪnˈækjʊrəsi/

inaccuracy

不准确
Meaning
lack of accuracy or precision; an incorrect or wrong detail
Example
The report contained several factual inaccuracies.
这份报告包含了一些不准确之处。
C1 verb /ɪmˈbɛd/

imbed

嵌入
Meaning
To fix firmly or deeply in a surrounding mass.
Example
The journalist imbedded himself with the troops to report firsthand.
记者将自己嵌入部队中以第一时间进行报道。
C1 adjective /ɪˈrɛfjʊtəbəl/

Irrefutable

不可反驳的
Meaning
impossible to deny or disprove; undeniable
Example
The evidence against him was irrefutable.
对他的证据是不可反驳的。
C1 adverb /ɪnˈvɜːrs.li/

Inversely

反向地; 相反地
Meaning
in a way that is opposite or contrary; in reverse order or manner
Example
The price of goods is inversely related to their availability in the market.
商品的价格与其在市场上的可得性成反比。
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。
C1 verb /ˈɪnkjʊˌbeɪt/

incubate

孵化
Meaning
to keep eggs, cells, or organisms at the right conditions for development
Example
The hen will incubate the eggs until they hatch.
母鸡会孵化蛋直到它们孵化。
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 noun /ɪnˈtruː.ʒən/

intrusion

未经授权的进入
Meaning
Unauthorized entry into a system or place without permission
Example
The company detected an intrusion in its server.
公司在其服务器中发现了入侵。
C1 adjective /ɪmˈpoʊzɪŋ/

imposing

壮观的
Meaning
having an appearance that is grand, impressive, or commanding
Example
The castle is an imposing structure overlooking the valley.
这座城堡是一座壮观的建筑，俯瞰着山谷。
C1 noun /ˌɪn.dɪˈsɪʒ.ən/

Indecision

优柔寡断; 怀疑; 犹豫不决
Meaning
the inability to make decisions quickly; uncertainty about what to do
Example
Her indecision about which job offer to accept caused her to miss both opportunities.
她对接受哪个工作机会的犹豫导致她错过了两个机会。
C1 adjective /ɪnˈdɪɡnənt/

indignant

愤怒
Meaning
Feeling or showing anger at something considered unfair or unjust.
Example
She was indignant when accused of cheating.
她在被指控作弊时感到愤怒。
C1 adjective /ɪnˈtjuː.ɪ.tɪv/

intuitive

直觉的
Meaning
Based on instinctive understanding rather than reasoning.
Example
The software has an intuitive design that makes it easy to use.
该软件具有直观的设计，使其易于使用。
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 /ɪmˈplɔːzəbl/

implausible

不可信
Meaning
Not seeming reasonable or probable; unlikely to be true.
Example
The story she told was so implausible that no one believed her.
她讲的故事太不可信，以至于没有人相信她。
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 adjective /ˌɪrɪˈvɜːrsəbl/

irreversible

不可逆的
Meaning
Not able to be undone, changed, or reversed.
Example
The damage caused by the fire was irreversible.
火灾造成的损失是不可逆的。
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。
C1 noun /ˌaɪ.diˈɒl.ə.dʒi/

ideology

意识形态
Meaning
A system of ideas and ideals, especially one that forms the basis of economic or political theory and policy.
Example
Democracy is based on the ideology of freedom and equality.
民主基于自由和平等的意识形态。
C1 noun /ˌɪntərˈmiːdiˌɛri/

intermediary

中介
Meaning
A person who acts as a link between people in order to try to bring about an agreement; a mediator.
Example
The diplomat served as an intermediary between the two conflicting nations.
外交官作为两国冲突中的中介起到了作用。
C1 adjective /ɪnˈdefɪnət/

Indefinite

不确定的
Meaning
not clearly defined; uncertain; vague; unlimited in time
Example
The meeting has been postponed for an indefinite period.
会议被推迟到一个不确定的时期。
C1 adjective /ˌɪnkənˈsɪdərət/

inconsiderate

不体贴
Meaning
Thoughtless; showing a lack of concern for others.
Example
It was inconsiderate of him to play loud music late at night.
他在深夜播放大声音乐，显得很不体贴。
C1 noun ˌɪnfrəˈstrʌktʃərəl dɪˈveləpmənt

infrastructural development

基础设施发展
Meaning
The process of building and improving the basic physical and organizational structures and facilities needed for the operation of a society or enterprise.
Example
Infrastructural development is necessary for efficient recycling.
基础设施发展对高效的回收至关重要。
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 noun /ɪnˈɛk.wɪ.ti/

inequity

不公平
Meaning
Lack of fairness or justice; unequal distribution or treatment.
Example
Social inequity continues to be a global issue.
社会不公平仍然是一个全球性问题。
C1 noun /ˈɪmɪnəns/

imminence

即将发生，临近状态
Meaning
the state of being about to happen
Example
The imminence of the storm forced people to take shelter.
风暴的临近使人们不得不寻找庇护所。
C1 verb /ˈɪnstɪˌɡeɪt/

instigate

挑拨
Meaning
To bring about or initiate an action, often something negative.
Example
He was accused of instigating the riot.
他被指控挑起暴乱。
C1 adjective /ˌɪnkənˈkluːsɪv/

inconclusive

不确定的
Meaning
Not leading to a definite result or decision.
Example
The investigation remained inconclusive due to a lack of evidence.
由于缺乏证据，调查仍然是没有结果的。
C1 adjective /ˈɪɡ.ni.əs/

igneous

火成
Meaning
Formed through the cooling and solidification of magma or lava.
Example
Granite is an igneous rock commonly used in construction.
花岗岩是一种常用于建筑的火成岩。
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。
C1 noun ɪnˈsɒl.vən.si

insolvency

破产
Meaning
The state of being unable to pay debts owed; bankruptcy.
Example
The company declared insolvency after years of losses.
公司在多年的亏损后宣布破产。
C1 noun /ˈɪnflʌks/

influx

涌入
Meaning
A large arrival or flow of people or things.
Example
The city experienced an influx of tourists during the festival.
这座城市在节日期间经历了大量游客的涌入。
C1 adjective /ˈɪnbɔːrn/

Inborn

与生俱来的; 天生的; 内在的
Meaning
existing from birth; natural; inherent
Example
She has an inborn talent for music.
她有天生的音乐才能。
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。
C1 noun /ˌɪmpɔːrˈteɪʃən/

importation

进口
Meaning
The act of bringing goods or services into a country from abroad
Example
The importation of luxury goods is strictly regulated.
奢侈品的进口受到严格监管。
C1 adjective /ɪnˈhjuːmən/

Inhuman

不人道的
Meaning
lacking human qualities; cruel; brutal; savage
Example
The dictator's inhuman treatment of prisoners shocked the international community.
独裁者对囚犯的非人道待遇震惊了国际社会。
C1 adjective /ɪmˈpɛndɪŋ/

impending

即将来临
Meaning
about to happen soon, usually something unpleasant or threatening
Example
The villagers were worried about the impending flood.
村民们为即将来临的洪水感到担忧。
C1 verb /ɪˈluːmɪneɪt/

illuminate

照亮
Meaning
To light up or make something clearer.
Example
Streetlights illuminate the road at night.
路灯在夜晚照亮了道路。
C1 noun /ɪˈmiːdiəsi/

immediacy

即时性, 紧迫感
Meaning
The quality of bringing one into direct and instant involvement with something, giving rise to a sense of urgency or excitement.
Example
The immediacy of digital communication has reshaped business operations.
数字通信的即时性已经改变了商业操作。
C1 noun /ɪnˈfjuːʒən/

infusion

草药注入
Meaning
the act of introducing something into another; a drink made by steeping leaves or herbs in liquid
Example
She prepared a calming infusion of chamomile tea.
她准备了一杯舒缓的洋甘菊茶注入。
C1 verb /ɪmˈpɛrɪl/

imperil

使处于危险中
Meaning
To put in danger or at risk.
Example
Reckless driving can imperil the lives of others.
鲁莽驾驶可能会危及他人的生命。
C1 noun ɪmˈpɛə(r)mənt

impairment

损伤, 残疾
Meaning
The state of being damaged or weakened; a disability or handicap.
Example
Hearing impairment can be caused by long-term exposure to loud noise.
听力损失可能是由长时间暴露于大声噪音造成的。
C1 noun /ɪnˈsɜːʃən/

insertion

插入
Meaning
the action of inserting something into something else
Example
The insertion of the new data was completed successfully.
新数据的插入已成功完成。
C1 adjective /ɪˈrɛvərənt/

irreverent

不敬的
Meaning
showing a lack of respect for people or things that are usually respected
Example
The comedian’s irreverent jokes offended some of the audience.
那位喜剧演员的不敬笑话冒犯了一些观众。
C1 noun /ˌɪnkəmˌpætəˈbɪlɪti/

incompatibility

不兼容性
Meaning
the state of being unable to exist or work together harmoniously; lack of compatibility
Example
The project failed because of incompatibility between the two software systems.
由于两个软件系统之间的不兼容性，项目失败了。
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。
C1 noun ɪnˌten.sɪ.fɪˈkeɪ.ʃən

intensification

强化
Meaning
The process of becoming or making something more intense or extreme.
Example
The intensification of climate change requires urgent action.
气候变化的强化需要紧急行动。
C1 verb /ɪˈmɔːrtəlaɪz/

immortalize

永生
Meaning
to preserve the memory of someone or something forever
Example
The statue was built to immortalize the hero’s sacrifice.
这座雕像是为了让英雄的牺牲永生化。
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。
C1 noun /ˈɪnkwest/

inquest

调查
Meaning
A legal or official inquiry, especially into the cause of a death.
Example
The inquest revealed the cause of the accident.
调查揭示了事故的原因。
C1 noun /ɪnˈdem.nə.ti/

Indemnity

赔偿
Meaning
security or protection against a loss or other financial burden; compensation for damage or loss
Example
The insurance company provided full indemnity for the damages caused by the flood.
保险公司为洪水造成的损失提供了完全的赔偿。
C1 adjective /ɪnˈsʌf.ər.ə.bəl/

insufferable

无法忍受
Meaning
Too extreme to bear; intolerable.
Example
The heat during the summer was insufferable.
夏天的炎热是无法忍受的。
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。
C1 noun /ˌɪndɪɡˈneɪʃən/

indignation

愤慨
Meaning
Strong displeasure or anger caused by something unjust, offensive, or insulting.
Example
Public indignation grew after the unfair verdict.
在不公正的裁决之后，公众的愤慨情绪上升。
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。
C1 adjective /ɪmˈpæsɪv/

impassive

冷漠
Meaning
Not showing or feeling emotion; expressionless.
Example
Despite the shocking news, she remained impassive.
尽管有令人震惊的消息，她依然无动于衷。
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 adjective /ɪnˈedəbəl/

Inedible

不可食用
Meaning
not suitable or safe for eating; not edible
Example
The mushrooms were poisonous and completely inedible.
蘑菇是有毒的，完全不可食用。
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。
C1 noun /ˈɪnsɪdəns/

incidence

事件发生率
Meaning
the occurrence, rate, or frequency of something
Example
The incidence of road accidents has decreased this year.
今年道路事故的发生率有所下降。
C1 adjective /ɪˈnuːmərəbəl/

Innumerable

无数; 无尽; 无限
Meaning
too many to be counted; countless; infinite in number
Example
There are innumerable stars in the night sky that we cannot see with our naked eyes.
夜空中有无数的星星，我们无法用肉眼看到。
C1 adjective /ɪnˈhɛrənt/

inherent

固有的
Meaning
Existing in something as a natural, permanent, or essential quality.
Example
There are inherent risks in extreme sports.
极限运动中存在固有的风险。
C1 adjective /ˌɪnsɪˈdɛntəl/

incidental

附带的
Meaning
happening as a minor part or in connection with something else
Example
Incidental expenses like snacks and tips were included in the bill.
像零食和小费这样的附带费用被包含在账单中。
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。
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。
C1 adjective ɪnˈkʌm.bənt

incumbent

有义务的
Meaning
necessary for (someone) as a duty or responsibility.
Example
It is incumbent upon all citizens to obey the law.
所有公民都有义务遵守法律。
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。
C1 adjective /ɪnˈvɛntɪv/

inventive

富有创意的
Meaning
Having the ability to create or design new things or to think originally.
Example
The inventor was known for his inventive solutions to everyday problems.
发明家以其富有创意的解决方案而闻名。
C1 verb /ɪnˈsaɪt/

incite

煽动
Meaning
to provoke; to stir up
Example
His speech incited the crowd to violence.
他的演讲激起了人群的暴力。
C1 noun /ɪnˈdaɪtmənt/

indictment

起诉书
Meaning
a formal charge or accusation of a serious crime
Example
The indictment accused the company of multiple violations.
起诉书指控公司存在多项违规行为。
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。
C1 verb /ɪmˈpɒvərɪʃ/

impoverish

使贫穷
Meaning
To make someone poor or reduce the quality or richness of something.
Example
The long war impoverished the entire nation.
漫长的战争使整个国家贫困。
C1 noun /ˈɪnstɪˌɡeɪtər/

instigator

煽动者
Meaning
A person who brings about or initiates something, usually something bad.
Example
The police identified him as the instigator of the violence.
警方将他定为暴力的煽动者。
C1 verb /ɪɡˈnaɪt/

ignite

点燃
Meaning
To catch fire or cause to catch fire; to start or arouse.
Example
The sparks ignited the dry leaves in seconds.
火花在几秒钟内点燃了干叶。
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 /ɪnˈsɛnsəbl/

insensible

昏迷
Meaning
Unconscious; unaware of or indifferent to something.
Example
He was insensible to the cold as he lay in the snow.
他在雪地里躺着时，对寒冷昏迷不觉。
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。
C1 adjective ˌɪm.pəˈsɛp.tɪ.bəl

imperceptible

无法察觉的
Meaning
So subtle or gradual that it is difficult to notice or perceive
Example
The changes in his behavior were imperceptible at first.
他行为中的变化一开始几乎是无法察觉的。