inscrutable
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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。
C2 noun /ˌɪnkænˈdɛsəns/

incandescence

白炽光
Meaning
the emission of light from a hot object; brilliance
Example
The incandescence of the candle filled the dark room.
蜡烛的白炽光填满了黑暗的房间。
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 adjective /ɪnˈɡlɔːriəs/

inglorious

可耻的
Meaning
Causing shame or disgrace; not bringing honor or glory.
Example
The army suffered an inglorious defeat.
军队遭遇了可耻的失败。
C2 noun /ˈɪndɪkənt/

indicant

指示物
Meaning
Something that indicates or points to a fact or condition.
Example
High fever is often an indicant of infection.
高烧通常是感染的指示物。
C2 adjective /ˌɪnsəˈprɛsəbl/

insuppressible

不可抑制的
Meaning
That cannot be suppressed or restrained.
Example
She had an insuppressible urge to laugh during the ceremony.
她在仪式上有一种不可抑制的笑意。
C2 noun /ˌɪntərˈsɛsər/

intercessor

调解人
Meaning
a person who intervenes or pleads on behalf of another
Example
He acted as an intercessor to resolve the conflict between the two families.
他作为调解人解决了两个家庭之间的冲突。
C2 noun /ɪmˌpɜːrtərbəˈbɪləti/

imperturbability

安定性
Meaning
The quality of being calm and not easily disturbed or upset.
Example
Her imperturbability during the crisis impressed everyone.
她在危机中的安定性给所有人留下了深刻的印象。
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。
C2 verb /ɪnˈɡreɪʃiˌeɪt/

ingratiate

Meaning
To gain favor or approval by deliberate effort, often in a flattering way.
Example
She tried to ingratiate herself with her boss by complimenting him often.
C2 noun /ɪnˈfriːkwəns/

infrequence

罕见性
Meaning
The state of occurring rarely or at long intervals.
Example
The infrequence of their meetings made it hard to maintain close ties.
他们会议的罕见性使得保持亲密关系变得困难。
C2 noun /ɪmˈpruː.dəns/

Imprudence

轻率; 粗心; 不小心
Meaning
the quality of being imprudent; lack of care for consequences; recklessness
Example
His financial imprudence led to bankruptcy within just two years.
他的财务不谨慎导致了两年内破产。
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。
C2 adjective /ˈɪmənənt/

immanent

内在的
Meaning
existing or operating within; inherent
Example
He believed that moral values are immanent in human nature.
他相信道德价值在人的本性中是内在的。
C2 adjective /ˈɪkθiɪk/

ichthyic

鱼类的
Meaning
Relating to or resembling fish.
Example
The artist's painting had an ichthyic quality.
艺术家的画作具有鱼类的特质。
C2 adjective /ɪnˈsɛnseɪt/

insensate

无情的
Meaning
lacking physical sensation or empathy; without feeling or sensitivity
Example
The dictator's insensate cruelty shocked the world.
独裁者的无情残忍震惊了世界。
C2 adjective /ˌɪn.ɪˈlʌk.tə.bəl/

ineluctable

Meaning
Impossible to avoid or escape; inevitable.
Example
Death is an ineluctable part of human existence.
C2 adjective /ˌɪnɪˈsɛnʃəl/

inessential

非必要的
Meaning
not necessary or important; not essential
Example
The report removes all inessential details to stay focused.
报告删除了所有非必要的细节以保持重点。
C2 noun /ɪnˌtɛl.ɪˈdʒɛntsi.ə/

intelligentsia

知识分子阶层
Meaning
The group of people engaged in intellectual and cultural pursuits in a society.
Example
The intelligentsia played a key role in shaping public opinion.
知识分子阶层在塑造公众舆论方面发挥了重要作用。
C2 adjective /ɪmˌpɜːrˈsweɪdəbl/

impersuadable

难以说服
Meaning
not able to be convinced or persuaded
Example
She remained impersuadable despite all our arguments.
尽管我们的所有论点，她仍然难以说服。
C2 noun /ɪnˈtɛstəsi/

intestacy

无遗嘱的死亡
Meaning
The condition of dying without having made a valid will.
Example
His estate was divided according to the laws of intestacy.
他的财产根据无遗嘱的法律被分配。
C2 adjective /ɪnˈæpt/

Inapt

不合适; 不适当
Meaning
not suitable; inappropriate; unfit
Example
His comment was inapt for the formal meeting.
他的评论对正式会议不合适。
C2 noun /ɪnˈtɛmpərəns/

intemperance

放纵
Meaning
Lack of moderation or self-control, especially with drinking or eating.
Example
His intemperance in drinking ruined his health.
他的饮酒放纵毁了他的健康。
C2 noun (compound/erroneous entry) /ɪnˈɛksərəbl ɑːrmi/

inexorableinexorablearmy

无法阻挡的军队
Meaning
This appears to be a corrupted or concatenated form; interpreted as 'inexorable army' — an unstoppable or relentless force.
Example
The rebels feared the inexorable army approaching their stronghold.
叛军害怕即将接近他们堡垒的无法阻挡的军队。
C2 adjective /ɪnˈsuːpərəbl/

insuperable

不可逾越
Meaning
Impossible to overcome or surpass.
Example
The team faced insuperable challenges during the expedition.
团队在探险过程中面临了不可逾越的挑战。
C2 adjective /ɪnˈfɜːrnəl/

infernal

地狱的
Meaning
relating to hell; extremely troublesome or annoying
Example
The workers complained about the infernal noise from the construction site.
工人们抱怨施工现场的地狱般噪音。
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。
C2 noun /ɪˈrʌp.ʃən/

Irruption

突然的暴力入侵; 入侵或突袭; 突如其来的爆发或喷发
Meaning
a sudden violent entry; an invasion or raid; a sudden outburst or eruption
Example
The army's irruption into enemy territory caught the opposing forces completely off guard.
军队的突然闯入敌方领土使对方力量完全措手不及。
C2 adjective /ɪnˈkɒnstənt/

inconstant

不稳定的
Meaning
frequently changing; not consistent or dependable
Example
His inconstant moods made it difficult to work with him.
他的情绪不稳定使得与他合作变得困难。
C2 adjective /ˌɪnkəmˈbʌstəbl/

incombustible

不燃烧
Meaning
Not capable of catching fire or burning.
Example
This material is incombustible and safe for construction.
这种材料是防火的，适合建筑使用。
C2 adjective /ɪnˈsɛndiˌɛri/

incendiary

煽动性的 / 挑衅的
Meaning
designed to cause fires or stir up conflict
Example
The politician’s incendiary remarks angered the crowd.
政治家的挑衅性言论激怒了人群。
C2 noun /ˈaɪ.lət/

islet

小岛
Meaning
A very small island.
Example
The fishermen rested on a tiny islet before continuing their journey.
渔民们在继续他们的旅程之前，在一个小岛上休息。
C2 noun /ˈɪrɪtənsi/

irritancy

恼怒
Meaning
the quality or state of causing irritation; legal or formal invalidation
Example
The constant noise became an irritancy to the neighbors.
持续的噪音成为邻居的恼怒源。
C2 noun /ˌaɪ.diˈeɪ.ʃən/

ideation

构思过程
Meaning
The process of forming and developing new ideas or concepts through creative thinking and brainstorming.
Example
The team engaged in ideation sessions to generate new product ideas.
The team conducted brainstorming sessions to generate new product ideas.
C2 adjective /ˌɪnkænˈdɛsənt/

incandescent

白炽的
Meaning
emitting light as a result of being heated; extremely bright or passionate
Example
The incandescent lamp lit up the entire hall.
白炽灯照亮了整个大厅。
C2 adjective /ɪnˈseɪʃiət/

insatiate

无法满足
Meaning
impossible to satisfy; always wanting more
Example
He had an insatiate desire for power.
他有一个无法满足的权力愿望。
C2 verb /ɪnˈfætʃueɪt/

infatuate

迷恋
Meaning
to inspire with an intense but short-lived passion or admiration
Example
He was infatuated with her beauty.
他被她的美貌迷住了。
C2 noun /ˈɪmpjʊdəns/

impudence

无礼
Meaning
Rude and disrespectful behavior.
Example
The student's impudence shocked the entire class.
学生的无礼行为让全班震惊。
C2 adjective /ˌɪndɪˈtɜːrmənət/

indeterminate

不确定
Meaning
Not exactly known, defined, or established; vague or uncertain.
Example
The project was delayed for an indeterminate amount of time.
项目因不确定的时间被推迟。
C2 noun /ɪnˈhɪərəns/

inherence

内在性
Meaning
The state of being an essential or permanent part of something.
Example
The inherence of risk is part of every business venture.
风险的内在性是每个商业冒险的一部分。
C2 noun /ˌɪntərpəˈzɪʃən/

interposition

干预
Meaning
The act of intervening or coming between two things, often to influence or prevent an outcome.
Example
The manager’s interposition prevented a heated argument from escalating.
经理的干预阻止了激烈争论的升级。
C2 adjective /ɪnˈtræn.sɪ.dʒənt/

intransigent

固执的, 不妥协的, 不肯改变的
Meaning
Unwilling or refusing to change one's views or to agree about something.
Example
His intransigent stance delayed the agreement.
他顽固不化的立场延误了协议。
C2 verb /ˌɪntərˈsiːd/

intercede

Meaning
to act or plead on behalf of someone in difficulty or trouble; to intervene between parties to help resolve a dispute
Example
She interceded with the teacher to give her brother another chance.
C2 adjective /ɪnˈvɪdiəs/

invidious

引起嫉妒的
Meaning
likely to arouse resentment, envy, or anger in others
Example
The manager's invidious remarks created tension among the employees.
经理的嫉妒言论在员工中间造成了紧张气氛。
C2 adjective /ˌɪnɪkˈspiːdiənt/

inexpedient

不合适
Meaning
Not advisable, suitable, or practical in the circumstances.
Example
It would be inexpedient to invest without proper research.
在没有适当研究的情况下进行投资是不合适的。
C2 noun /ɪˌluːmɪˈnɑːti/

illuminati

光明会
Meaning
a group of people claiming to have special enlightenment or secret knowledge, often linked to conspiracies
Example
Many conspiracy theories involve the Illuminati as a secret world-controlling group.
许多阴谋论涉及光明会，认为它是一个秘密的、控制世界的组织。
C2 adjective /ɪnˈtɛmpərət/

intemperate

失控的
Meaning
Lacking self-control; immoderate, especially in indulgence.
Example
The politician's intemperate remarks caused controversy.
政治家的失控言论引发了争议。
C2 verb /ɪmˈpjuːn/

impugn

Meaning
to dispute the truth, validity, or honesty of a statement or motive
Example
The lawyer tried to impugn the credibility of the witness.
C2 noun /ɪnˈsaɪzər/

incisor

切牙
Meaning
a narrow-edged tooth at the front of the mouth, adapted for cutting
Example
The dentist noted that his upper left incisor was chipped.
牙医注意到他的上左切牙裂开了。
C2 noun /ɪnˈɡrætɪˌtjuːd/

ingratitude

忘恩负义
Meaning
Lack of gratitude; failure to show thanks or appreciation.
Example
His ingratitude hurt her feelings after all she had done for him.
他的忘恩负义伤害了她的感情，尽管她为他做了这么多。
C2 adjective /ˌɪrɪˈfrændʒɪbəl/

irrefrangible

不可侵犯的
Meaning
Not to be broken, violated, or infringed
Example
The constitution guarantees certain irrefrangible rights to every citizen.
宪法保证每个公民享有某些不可侵犯的权利。
C2 noun /ˈaɪ.ərn.wʊd/

Ironwood

铁木
Meaning
a hard, dense wood from various trees; also the tree itself that produces small flowers
Example
The ironwood tree blooms with tiny white flowers.
铁木树开着小白花。
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。
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 adjective /ɪˈmɒdərət/

immoderate

过度的
Meaning
excessive; beyond reasonable limits
Example
He has an immoderate love for sweets.
他对糖果有过度的喜爱。
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。
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。
C2 adjective /ˌɪnɪkˈstrɪkəbl/

inextricable

无法分开
Meaning
Impossible to separate or escape from.
Example
The two friends shared an inextricable bond.
这两个朋友共享了一个无法分开的联系。
C2 adjective /ˌɪmpɪˈkjuːniəs/

impecunious

贫穷
Meaning
Having little or no money; poor.
Example
He grew up in an impecunious family.
他在一个贫穷的家庭中长大。
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 /ˈɪmɪˌteɪtər/

imitator

模仿者
Meaning
a person who copies the behavior, style, or actions of others
Example
He became famous as an imitator of popular singers.
他因模仿流行歌手而出名。
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 noun /ˈaɪ.səˌbɑːr/

isobar

等压线
Meaning
A line on a weather map connecting points of equal atmospheric pressure.
Example
The meteorologist explained how isobars indicate wind speed and direction.
气象学家解释了等压线如何指示风速和风向。
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。
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。
C2 adjective /ɪnˈeɪliənəbl/

inalienable

不可转让
Meaning
Unable to be taken away or transferred; absolute and permanent.
Example
Freedom of speech is an inalienable right.
言论自由是一项不可转让的权利。
C2 adjective /ˌɪnɔːˈspɪʃəs/

Inauspicious

不吉利
Meaning
unlucky; showing signs that future success is unlikely; unfavorable
Example
The dark clouds seemed inauspicious for the wedding.
黑云似乎对婚礼不吉利。
C2 noun /ˌɪmprɪˈkeɪʃən/

imprecation

诅咒
Meaning
A spoken curse or expression of strong condemnation.
Example
The angry crowd hurled imprecations at the corrupt official.
愤怒的人群向腐败的官员投掷了诅咒。
C2 noun /ˈɪd.i.ə.si/

Idiocy

愚蠢
Meaning
extremely stupid behavior or actions; foolishness
Example
The decision to ignore safety protocols was pure idiocy that endangered everyone.
忽视安全协议的决定是纯粹的愚蠢，危及了每个人。
C2 adjective /ɪˈnɪkwɪtəs/

iniquitous

不公正
Meaning
grossly unfair and morally wrong
Example
Slavery was one of the most iniquitous practices in history.
奴隶制是历史上最不公正的实践之一。
C2 adjective /ˌɪntərˈniːsaɪn/

internecine

内部冲突
Meaning
Relating to conflict within a group, often causing mutual destruction.
Example
The internecine conflict weakened the organization from within.
内部冲突削弱了组织内部的力量
C2 adjective /ɪnˈvaɪələbl/

inviolable

不可侵犯的
Meaning
never to be broken, dishonored, or violated
Example
Human rights are considered inviolable in modern democracies.
在人权被视为不可侵犯的现代民主国家。
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。
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。
C2 noun /ˌɪnkrʌˈsteɪʃən/

incrustation

外壳
Meaning
a crust or hard coating formed on the surface of something
Example
The old pipes were blocked due to heavy incrustation of minerals.
由于矿物质的重积附，旧管道被堵塞了。
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。
C2 verb /ɪnˈdʒɛst/

ingest

摄取
Meaning
To take food, drink, or another substance into the body, usually by swallowing.
Example
The patient must ingest the medicine with water.
病人必须用水服用药物。
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。
C2 adjective /ˌɪnfɪnɪˈtɛsɪməl/

infinitesimal

微不足道
Meaning
Extremely small in size or amount; so tiny as to be almost negligible.
Example
The error was so infinitesimal that it didn’t affect the results.
这个错误如此微不足道，以至于没有影响结果。
C2 adjective /ɪˈlɪbərəl/

illiberal

非自由主义的
Meaning
Opposed to liberal principles; restricting freedom of thought or behavior.
Example
The government was criticized for its illiberal policies.
政府因其非自由主义的政策而受到批评。
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 noun /ˌɪnəməˈrɑːtə/

inamorata

Meaning
A woman with whom someone is in love; a female lover.
Example
He wrote a poem dedicated to his inamorata.
C2 adjective /ɪnˈkɒŋɡruənt/

incongruent

不一致的
Meaning
Not in harmony or keeping with the surroundings or other aspects.
Example
His casual outfit looked incongruent at the formal dinner.
他穿的休闲装在正式晚宴上显得不一致。
C2 adjective /ˌɪnkɒntrəˈvɜːtəbl/

incontrovertible

不可否认
Meaning
impossible to deny or dispute; unquestionable
Example
The evidence was incontrovertible and proved his innocence.
证据是不可否认的，并证明了他的清白。
C2 noun /ɪnˌtɜːrpəˈleɪʃən/

interpolation

插值
Meaning
The act of inserting something into a text or estimating values within a sequence of data.
Example
The scientist used interpolation to predict the missing data points.
科学家使用插值法来预测缺失的数据点。
C2 adjective ɪˈnɛfəbl

ineffable

难以形容
Meaning
Too great or extreme to be expressed or described in words.
Example
The beauty of the landscape was ineffable.
景色的美丽是难以形容的。
C2 adjective /ɪnˈsuːsiənt/

insouciant

无忧无虑
Meaning
Showing a casual lack of concern; carefree.
Example
He gave an insouciant shrug and walked away.
他无忧无虑地耸了耸肩，然后走开了。
C2 noun /ɪmˈprɑːvɪdəns/

improvidence

缺乏远见
Meaning
Lack of foresight or care for future needs.
Example
His improvidence led to financial difficulties.
他的缺乏远见导致了财务困难。
C2 noun /aɪˈkɒnəklæst/

iconoclast

破坏偶像者
Meaning
A person who attacks or criticizes cherished beliefs, traditions, or institutions.
Example
He was known as an iconoclast who challenged old traditions.
他被认为是一个破坏偶像者，挑战旧传统。
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。
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。
C2 noun /ɪmp/

imp

小顽皮精灵
Meaning
a small mischievous devil or sprite; a playful troublemaker
Example
The child was acting like a little imp, hiding his toys everywhere.
那个孩子像一个小顽皮精灵，四处藏玩具。
C2 adjective /ɪnˈkɒntɪnənt/

incontinent

失禁
Meaning
lacking control over urination or defecation; lacking self-restraint
Example
The patient was incontinent after surgery.
病人在手术后失禁。
C2 noun /ˈaɪ.kɒn/

ikon

宗教图像或符号
Meaning
A religious image or symbol, especially in the Eastern Orthodox Church.
Example
The church displayed a beautifully painted ikon of the Virgin Mary.
教堂展示了美丽的圣母玛利亚圣像。
C2 noun /ˈɪndələns/

indolence

懒惰
Meaning
Avoidance of activity or exertion; laziness.
Example
His indolence kept him from finishing the project on time.
他的懒惰使他无法按时完成项目。
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。
C2 noun /ɪnˈtɜːrstɪs/

interstice

缝隙
Meaning
a small space that lies between things
Example
Light filtered through the narrow interstices of the wall.
光线透过墙壁的狭窄缝隙照射进来。
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 adjective /ˌɪrɪˈmiːdiəbl̩/

irremediable

无法修复的
Meaning
Impossible to cure, repair, or remedy.
Example
The damage to the ancient manuscript was irremediable.
古老手稿的损坏是无法修复的。
C2 verb /ˌɪmpɔːrˈtuːnd/

importuned

不停地请求
Meaning
asked someone persistently and pressingly for something
Example
She importuned her boss for a raise until he finally gave in.
她不停地请求老板加薪，直到他最终答应。
C2 verb /ˈɪməleɪt/

immolate

自焚
Meaning
To kill or sacrifice, especially by burning.
Example
The protesters threatened to immolate themselves in front of the building.
抗议者威胁要在建筑物前自焚。
C2 adjective /ˈɪnmoʊst/

inmost

最深的
Meaning
Situated at the very heart or deepest part; most private or secret.
Example
She revealed her inmost thoughts to her closest friend.
她向她最亲密的朋友透露了她最深的想法。
C2 adjective /ɪnˈkoʊ.ɪt/ or /ɪnˈkoʊ.eɪt/

inchoate

未完成的
Meaning
Just begun and not fully formed; rudimentary.
Example
His inchoate ideas needed more research to be developed.
他的未完成的想法需要更多的研究才能发展。
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。
C2 adjective /ˌɪndɪˈsɜːrnəbl/

indiscernible

难以察觉的
Meaning
Impossible or difficult to see, notice, or distinguish.
Example
The difference between the two shades was almost indiscernible.
这两种色调之间的差异几乎难以察觉。
C2 noun /ɪˈluːmɪnənt/

illuminant

光源
Meaning
A substance or device that produces light.
Example
The lamp acted as an illuminant in the dark cave.
这盏灯在黑暗的洞穴中充当了光源。
C2 noun /ˈɪɡ.nəˌmɪn.i/

ignominy

耻辱
Meaning
Public shame, disgrace, or dishonor.
Example
He lived the rest of his life in ignominy after the scandal.
他在丑闻后余生都活在耻辱中。
C2 adjective /ˈɪm.pi.əs/

Impious

不敬的; 亵渎神明
Meaning
irreligious; lacking reverence for religion; blasphemous
Example
The impious act shocked the religious community.
不敬的行为震惊了宗教社区。
C2 verb /ɪˈniː.bri.eɪt/

inebriate

Meaning
to intoxicate; to make someone drunk
Example
The strong wine was enough to inebriate even the most experienced drinker.
C2 noun /ˌɪnkænˈteɪʃən/

incantation

咒语
Meaning
a series of words used as a magic spell or charm
Example
The wizard chanted an incantation to summon the spirits.
巫师念了一段咒语来召唤灵魂。
C2 noun /ɪˌledʒ.əˈbɪl.ə.ti/

Illegibility

难以辨认
Meaning
the quality of being impossible or difficult to read; unclear writing or print
Example
The doctor's handwriting was famous for its illegibility among the pharmacy staff.
医生的字迹因其难以辨认而在药房工作人员中广为人知。
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。
C2 noun /ɪnˈɛrənsi/

inerrancy

无误性
Meaning
the belief or quality of being free from error; absolute correctness
Example
Some religious groups strongly affirm the inerrancy of their sacred texts.
一些宗教团体强烈坚持他们圣经的无误性。
C2 adjective /ɪnˈkɒrɪdʒəbəl/

incorrigible

无法纠正的
Meaning
incapable of being corrected, improved, or reformed
Example
He is an incorrigible optimist who never loses hope.
他是一个无法纠正的乐观主义者，从不放弃希望。
C2 noun /ɪmˈpjuːɪsəns/

impuissance

无能, 无力
Meaning
inability to take effective action; helplessness
Example
The government’s impuissance in the face of crisis frustrated the people.
政府在危机面前的无能让人民感到沮丧。
C2 adverb /ˈaɪsɪli/

icily

冷漠地
Meaning
In a very cold, unfriendly, or hostile manner.
Example
She replied icily to his question.
她冷漠地回答了他的问题。
C2 noun /ɪmˈpʌlʃən/

impulsion

Meaning
a strong urge or drive to act; the act of impelling
Example
His impulsion to travel made him leave his job suddenly.
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。
C2 verb ɪmˈbaɪb

imbibe

吸收, 同化, 喝
Meaning
Absorb or assimilate ideas or knowledge. To drink or take in.
Example
He tried to imbibe the wisdom from his mentor.
他试图从他的导师那里吸收智慧。
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。