impair 削弱，减少：The output of produce was impaired by the bad weather

impartial 公正的，无偏见的：A judge should be impartial

implement 工具，器具，用具：new types of farm implements

impose 征(税)，加(负担，惩罚等)于(on, upon)：impose additional tax on business expansion

impulse 推动，驱动：give an impulse to the development of the friendly relations between the two countries

inaccessible 达不到的：The two rocks at the top of the steep hill is at first sight inaccessible

incline倾斜：The shaft inclines almost thirty degree

incorporate 包含，吸收：His book incorporates his earlier essays

incur 招致，引起，遭受：incur sb’s displeasure(envy)

indignant 愤怒的，愤慨的：The actress was at the columnist’s personal questions

indispensable 必不可少的，必需的(to. for)： Oxygen is indispensable to life

induce 引诱，劝使：Nothing will induce me to do that

infer (根据已知事实等)推断，推定(from)：From his grades I inferred that he was a good student

ingenious (人,头脑等)灵巧的，足智多谋的：an ingenious designer

initiate 开始，发起：initiate a conversation

innovate 革新，改革，创新(in,on/upon)：innovate on another’s creation

inquire 询问，打听：He inquired what the weather was likely to be

insert 插入，嵌入：In the pause he managed to inquire a question

inspire 鼓舞，激起：His speech inspires the crowd

instant 紧急的，急迫的，立即的，即刻的：be in instant need of help

institute 学会，协会，学院，研究院：an institute for the blind

insulate 隔音，使隔绝(以免受到影响)：We are not insulated from the real world the way we were

insult 侮辱，辱骂：She insulted him by calling him a coward

insure 保险，给。。。保险：Every father should insure his life for the sake of his wife and children

intact 完整无缺的，未经触动的，未受损伤的：an intact family

integrate使成一体，使合并(with, into)：integrate traditional Chinese medicine with western medicine

interfere 妨碍，冲突(with)：Misty weather interfered with the contact

intermittent 间歇的，断断续续的，周期性的：suffer from intermittent headaches

intervene 插入，介入：A week intervenes between Christmas and New Year’s Day

intricate 错综复杂的，复杂精细的：A detective story usually has an intricate plot

invert 使反向，使倒转，使颠倒：The magician inverted the bag to show it was empty

irrespective 不考虑的，不顾的(of) ：irrespective of consequences

irritate 激怒，使恼怒，使烦躁：be irritated by sb’s insolence