intrinsically
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C1 adverb ɪnˈtrɪn.zɪ.kli

intrinsically

内在地
Meaning
In a way that is naturally or inherently part of something's essential nature.
Example
Some people are intrinsically motivated to learn.
有些人内在地受到学习的激励。
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 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 adjective ˌɪn.tə.dʒen.əˈreɪ.ʃən.əl

intergenerational

代际的，存在于不同代际之间
Meaning
Existing or occurring between different generations of a family.
Example
Intergenerational wisdom ensures cultural continuity.
代际智慧确保文化的延续。
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 noun /ˌɪməˈtjʊərəti/

immaturity

不成熟
Meaning
the state of not being fully developed emotionally, mentally, or physically; lack of maturity
Example
His immaturity made it difficult for him to handle responsibility.
他的不成熟让他难以承担责任。
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。
C1 verb /ɪmˈploʊd/

implode

内爆
Meaning
To collapse or burst inward violently.
Example
The old building imploded during the demolition.
老建筑在拆除时发生了内爆。
C1 adjective /ˌɪnkɒmprɪˈhɛnsəbl/

incomprehensible

难以理解的
Meaning
Impossible or very difficult to understand.
Example
The professor’s lecture was so fast it became incomprehensible.
教授的讲座太快了，以至于变得难以理解。
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 noun /ɪnˈsɜːrdʒəns/

insurgence

叛乱
Meaning
An act of rebellion or uprising against authority.
Example
The government struggled to contain the growing insurgence.
政府难以控制日益增长的叛乱。
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。
C1 adjective /ɪˈmuː.və.bəl/

immovable

不可移动
Meaning
Not able to be moved; fixed in position.
Example
Immovable barriers prevent change.
不可移动的障碍阻止了改变。
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 noun ɪnˌɛv.ɪ.təˈbɪl.ɪ.ti

inevitability

必然性
Meaning
The quality of being certain to happen and impossible to avoid or prevent.
Example
The inevitability of change is a part of life.
变化的必然性是生活的一部分。
C1 adjective /ɪnˈkɒmp(ə)rəbl/

incomparable

无可比拟
Meaning
Without an equal in quality or excellence; matchless.
Example
The view from the mountain was incomparable.
山顶的景色无可比拟。
C1 adjective ˌɪdiəsɪnˈkrætɪk

idiosyncratic

独特且个性化
Meaning
Relating to idiosyncrasy; peculiar or individual.
Example
His idiosyncratic behavior set him apart from his colleagues.
他的独特行为使他与同事们区别开来。
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 adjective /ɪnˈkwɪzɪtɪv/

inquisitive

好奇的
Meaning
Curious or eager to learn and ask questions.
Example
The inquisitive child asked endless questions about the stars.
那个好奇的孩子问了关于星星无数的问题。
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 /ɪnˈstrʌktɪv/

instructive

有教育意义的
Meaning
useful and informative; providing knowledge or instruction
Example
The lecture was highly instructive and engaging.
这场讲座非常有教育意义且引人入胜。
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 verb /ɪnˈkɑːrsəreɪt/

incarcerate

监禁
Meaning
to imprison or confine someone
Example
The authorities incarcerated the criminal after the trial.
当局在审判后将罪犯监禁。
C1 noun /ɪnˈædɪkwəsi/

inadequacy

不足
Meaning
lack of sufficient ability, quality, or strength; a feeling of not being good enough
Example
She struggled with feelings of inadequacy at work despite her strong qualifications.
尽管资历很强，她在工作中仍感到不足。
C1 adjective ˌɪn.təˈmɪt.ənt

intermittent

间歇的
Meaning
Happening irregularly, not continuously.
Example
The rain was intermittent throughout the day.
雨整天都间歇不断。
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 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 adjective /ɪˈnɛpt/

inept

无能
Meaning
lacking skill or ability; clumsy or incompetent
Example
His inept handling of the situation made it worse.
他无能的处理使情况变得更糟。
C1 adjective /ˌɪməˈtɪəriəl/

immaterial

无关紧要
Meaning
Not important or relevant; lacking physical substance.
Example
The judge ruled that the argument was immaterial to the case.
法官裁定，该论点与案件无关。
C1 adjective ɪnˈdel.ə.bəl

indelible

不可磨灭的
Meaning
Making marks that cannot be removed; impossible to forget or remove.
Example
Her speech left an indelible mark on the audience.
她的演讲给观众留下了不可磨灭的印象。
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/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。
C1 adjective /ɪnˈveə.ri.ə.bəl/

Invariable

不变的；恒定的；始终相同的
Meaning
never changing; constant; always the same
Example
His invariable routine includes morning exercise and coffee.
他的恒定日常包括早晨锻炼和咖啡。
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 adjective /ˌɪnstənˈteɪniəs/

instantaneous

即时
Meaning
Happening immediately, without any delay.
Example
The change in temperature was almost instantaneous.
温度变化几乎是即时的。
C1 adjective /ˌɪnədˈmɪsəbl̩/

inadmissible

不可接受
Meaning
Not allowed, especially as evidence in a court of law.
Example
The judge ruled the evidence inadmissible.
法官宣布证据不可接受。
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 /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 adjective /ˈɪrɪtəbl/

irritable

Meaning
easily annoyed or made angry
Example
She became irritable after working long hours without rest.
C1 noun /ɪnˈsɒm.ni.ə/

Insomnia

失眠
Meaning
habitual sleeplessness; inability to sleep; the condition of being unable to sleep
Example
Her chronic insomnia made it difficult for her to concentrate during work hours.
她的慢性失眠让她在工作时难以集中注意力。
C1 adjective /ɪmˈpɑːrʃəl/

Impartial

公正的; 中立的
Meaning
treating all sides fairly; unbiased; neutral
Example
A good judge must remain impartial throughout the trial.
一个好的法官必须在整个审判过程中保持公正。
C1 adjective /ɪnˈveɪsɪv/

invasive

侵入性的
Meaning
Tending to spread harmfully, intruding aggressively, or encroaching beyond proper boundaries.
Example
The doctor explained that the procedure was minimally invasive.
医生解释说，该程序是最小的侵入性。
C1 verb ɪˈnɪʃɪeɪtɪd

initiated

启动
Meaning
Caused a process or action to begin; started something.
Example
The project was initiated to enhance marine biodiversity.
该项目已启动以促进海洋生物多样性。
C1 noun /ˌɪnfɪˈdɛləti/

infidelity

不忠
Meaning
the act of being unfaithful to a spouse or partner
Example
Their marriage ended due to his infidelity.
他们的婚姻因他的不忠而结束。
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 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 adjective /ɪnˈkɒmpɪtənt/

incompetent

Meaning
Lacking the necessary ability or skills to do something successfully.
Example
He was fired because he was incompetent at his job.
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 /ɪmˈpɜːrtɪnəns/

impertinence

无礼
Meaning
lack of respect; rudeness
Example
The teacher was shocked by the student's impertinence.
老师对学生的无礼感到震惊。
C1 noun ˌɪn.toʊˈneɪ.ʃən

intonation

语调
Meaning
The rise and fall of tone in speech and pronunciation.
Example
Proper intonation enhances the clarity of a speech.
正确的语调提高演讲的清晰度。
C1 adjective /ɪˈmjuː.tə.bəl/

immutable

不变的
Meaning
Unchangeable, permanent, or fixed
Example
The laws of physics are considered immutable.
物理定律被认为是不变的。
C1 verb /ɪnˈtruːd/

intrude

侵入
Meaning
To enter a place or situation where one is not wanted or not invited.
Example
He felt embarrassed to intrude on their private conversation.
他感到很尴尬，打扰了他们的私人谈话。
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。
C1 noun /ˌɪnsəˈfɪʃənsi/

insufficiency

不足
Meaning
The state of not being enough or not being adequate.
Example
The project failed due to the insufficiency of funds.
由于资金不足，项目失败了。
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 ɪnˈdɪdʒɪnəs trəˈdɪʃənz

Indigenous Traditions

原住民传统
Meaning
Cultural practices, beliefs, and customs that have been passed down through generations among native peoples.
Example
Indigenous traditions in the Chittagong Hill Tracts are unique.
吉大港山区的原住民传统独特。
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。
C1 adjective /ˌɪndɪˈvɪzəbl/

indivisible

Meaning
Not able to be divided or separated.
Example
The country's unity was indivisible despite differences.
C1 adjective /ɪmˈpɛtʃ.u.əs/

impetuous

冲动的
Meaning
Acting or done quickly and without thought or care; impulsive.
Example
His impetuous decision led to unexpected consequences.
他冲动的决定导致了意想不到的后果。
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。
C1 adjective /ˈɪntrɪkət/

intricate

复杂
Meaning
very detailed, complex, and difficult to understand
Example
The artist created an intricate pattern on the wall.
艺术家在墙上创造了一个复杂的图案。
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 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 verb /ˈɪmplɪˌkeɪt/

implicate

牵涉
Meaning
To show someone’s involvement in a crime or wrongdoing.
Example
The evidence implicated several officials in the scandal.
证据揭示了几名官员在丑闻中的牵涉。
C1 noun ˌɪm.pʌlˈsɪv.ɪ.ti

impulsivity

冲动性
Meaning
The tendency to act quickly and without thought or care; lack of self-control.
Example
His impulsivity led him to make reckless choices.
他的冲动性让他做出了鲁莽的决定。
C1 adjective /ɪmˈpʌlsɪv/

impulsive

冲动的, 直觉的
Meaning
acting suddenly without careful thought
Example
She made an impulsive decision to buy the car.
她做出了一个冲动的决定，买了车。
C1 verb ɪmˈbjuː

Imbue

将某个想法或感觉深深融入某人的心灵
Meaning
Mixing some idea or feeling deeply into someone's mind
Example
The teacher tried to imbue students with a love for learning.
老师试图将对学习的热爱注入学生心中。
C1 noun /ɪnˈhɛrɪtər/

inheritor

继承人
Meaning
a person who receives money, property, or a title when someone dies
Example
She became the inheritor of her family's estate.
她成为了家族财产的继承人。
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。
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。
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 adjective /ˈɜːrksəm/

irksome

恼人的
Meaning
annoying or irritating
Example
Waiting in a long line is one of the most irksome tasks.
在长队中等待是最让人恼火的任务之一。
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 /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 adjective /ɪnˈdʒʊəriəs/

injurious

有害的
Meaning
Causing or likely to cause harm or damage.
Example
Smoking is injurious to health.
吸烟对健康有害。
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 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 verb /ɪnˈsɪnjueɪt/

insinuate

Meaning
To suggest or hint something indirectly and often unpleasantly.
Example
He insinuated that she had lied about her qualifications.
C1 noun /ˌɪməˈrælɪti/

immorality

不道德
Meaning
the quality of being immoral; behavior that violates accepted moral standards
Example
The community condemned the immorality of the corrupt officials.
社会谴责了腐败官员的不道德行为。
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。
C1 adjective /ˌɪrɪˈspɛktɪv/

Irrespective

无论如何; 不考虑
Meaning
without taking something into account; regardless of
Example
All students will be treated equally, irrespective of their background.
所有学生都会平等对待，无论他们的背景如何。
C1 noun /ˌɪnflɛksɪˈbɪlɪti/

inflexibility

缺乏灵活性
Meaning
the quality of being rigid or unwilling to change; lack of adaptability
Example
The inflexibility of the rules caused unnecessary delays.
规则的缺乏灵活性导致了不必要的延误。
C1 adjective /ˌɪlɪˈdʒɪtɪmət/

illegitimate

非法
Meaning
Not authorized by law, rules, or standards; not recognized as valid.
Example
The court ruled the contract to be illegitimate.
法院裁定合同是非法的。
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。
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 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 /ˌɪntərˈtʃeɪndʒəbl/

interchangeable

可互换的
Meaning
able to be exchanged with each other without difference or loss of function
Example
These machine parts are interchangeable, so they can be replaced easily.
这些机器部件是可互换的，所以它们可以轻松地被替换。
C1 noun /ˈɪn.trə.vɜːrt/

introvert

内向
Meaning
A person who tends to be shy and prefers spending time alone rather than in groups.
Example
As an introvert, he preferred reading over attending parties.
作为一个内向的人，他更喜欢读书而不是参加派对。
C1 adjective /ɪˈlʌstriəs/

illustrious

著名
Meaning
Well known, respected, and admired for past achievements.
Example
She had an illustrious career in medicine.
她在医学界有着著名的事业。
C1 adjective /ɪnˈflæməbəl/

Inflammable

易燃; 可燃
Meaning
easily set on fire; flammable; combustible
Example
The inflammable material caught fire quickly.
易燃材料很快着火了。
C1 noun /ɪnˈsɜːrdʒənt/

insurgent

起义者
Meaning
A person who rises in revolt against authority or government.
Example
The army arrested several insurgents after the attack.
军队在袭击后逮捕了几名起义者。
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 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 /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。
C1 verb /ɪnˈvælɪdeɪt/

invalidate

使无效
Meaning
To make something not valid or legally acceptable.
Example
The new evidence may invalidate the previous ruling.
新证据可能使之前的裁决无效。
C1 adverb, adjective /ˌɪnkɑːɡˈniːtoʊ/

incognito

匿名
Meaning
In disguise or with one's identity concealed.
Example
The celebrity traveled incognito to avoid the paparazzi.
名人为了避免狗仔队，匿名旅行。
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 /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。
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 /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 adjective /ɪˈnɔːɡjərəl/

Inaugural

开幕
Meaning
marking the beginning of something; first; opening
Example
The president delivered his inaugural speech.
总统发表了他的开幕演讲。
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。
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 adjective /ɪnˈsteɪbəl/

instable

不稳定的
Meaning
not stable; liable to change, collapse, or fail; lacking firmness or reliability
Example
The instable political situation worried foreign investors.
不稳定的政治局势让外国投资者担心。
C1 adjective /ɪmˈprɒbəbl/

improbable

不太可能的
Meaning
Not likely to be true or to happen.
Example
It seems improbable that he will arrive on time.
看起来他准时到达的可能性很小。
C1 verb /ˌɪn.tɚˈtwaɪn/

intertwine

紧密连接或联系；一起扭曲或紧密结合
Meaning
To connect or link closely; to twist together or combine closely.
Example
Their lives became intertwined through years of friendship.
他们的生活通过多年的友谊紧密交织在一起。
C1 verb /ɪmˈpiːd/

impede

阻碍
Meaning
To obstruct or hinder the progress or development of something.
Example
Lack of funds can impede business growth.
资金短缺可能阻碍商业增长。
C1 noun /ˌɪnkwɪˈzɪʃən/

inquisition

宗教裁判
Meaning
A prolonged and intense questioning or investigation, often harsh in nature.
Example
The journalist faced an inquisition from the panel about his sources.
记者面对小组对他消息来源的严厉质询。
C1 adjective /ɪmˈpjʊər/

Impure

不纯
Meaning
contaminated; not clean; mixed with foreign substances
Example
The impure water caused health problems in the village.
不纯的水在村庄里引起了健康问题。
C1 verb /ɪmˈpiːtʃ/

impeach

Meaning
To charge a public official with misconduct while in office.
Example
The parliament voted to impeach the president.
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 adjective ˌɪn.krəˈmen.təl

incremental

增量
Meaning
Relating to or denoting an increase or addition, especially one of a series on a fixed scale; proceeding in small stages.
Example
Incremental changes ensure sustainability.
增量变化确保可持续性。
C1 noun /ˈɪrɪtənt/

irritant

刺激物
Meaning
something that causes irritation or discomfort
Example
Dust is a common irritant for people with allergies.
灰尘是过敏者常见的刺激物。
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。
C1 noun /ˈɪnkjʊˌbeɪtər/

incubator

恒温箱
Meaning
a device or environment that provides suitable conditions for eggs, cells, or infants to develop
Example
The premature baby was placed in an incubator for care.
早产儿被放入恒温箱接受护理。
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 noun ˌɪnsjʊˈleɪʃən

insulation

绝缘
Meaning
Material used to prevent heat, sound, or electricity from being transmitted from one area to another.
Example
Insulation of food storage areas can prevent pests from entering.
食品储存区的绝缘可以防止害虫进入。
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。
C1 adjective /ˌɪndɪˈstɪŋkt/

indistinct

模糊的
Meaning
Not clear or sharply defined; vague or blurred.
Example
The sound of voices was indistinct in the distance.
远处的声音是模糊的。
C1 noun /ˌɪn.trəˈvɜːr.ʒən/

introversion

内向
Meaning
The tendency to be inward-looking and shy, preferring solitary activities.
Example
Her introversion made it difficult for her to enjoy large parties.
她的内向让她很难享受大型聚会。
C1 adjective /ɪnˈtændʒəbl/

intangible

无形的
Meaning
Unable to be touched or grasped; not having a physical presence.
Example
Trust is an intangible quality in relationships.
信任是关系中一种无形的品质。