1.impartial a.(in, to)不偏不倚的，公正的(fair)

詞根記憶：im(不)+partial(偏見的)--沒有偏見的--公正的

例：Impart/al criticism公正的批評

派生詞：impartially (ad.公平地)

2.impeachment n．彈劾，控告(the act or process of impeaching)．

詞根記憶：來自impeach(礦彈劾，控告)

例：Not until Barbara Jordan's participation in the hearings on the impeachment of President Richard Nixon in 1974 was she made a nationally recognized figure.

3.impede v.妨礙，阻礙(to hinder)

詞根記憶：im(進入)+pede(腳)--插足--妨礙

例：The reluctance to abandon this hypothesis impeded new research.

派生詞：impediment(n．防礙，阻礙物)

同根詞：centipede(n．蜈蚣)

4.imperative a．必要的(absolutely necessary)；緊急的(urgent)；命令的(mandatory)

詞根記憶：imper(命令)+ative--命令的--緊急的

例：Reform of the tort system is imperative for bringing malpractice insurance premiums under control.

派生詞：imperatively( ad.命令式地)

5.implausible a．難以置信的( unbelievable)

詞根記憶：im(不)+plausible(可信的)--不可信的--難以置信的

例：It is implausible that the butler killed the cook, because he was in London then.

6.implement v.實施，貫徹(to carry out, accomplish) n.[常pl.]工具(tool, appliance)

詞根記憶：im+pIe(滿)+ment--（使）圓滿--貫徹

例：Our company implemented "shift-work equations" to reduce sickness and fatigue among shift workers.//stone implements石制工具

派生詞：implementation(n.執行)

7.implementation n.實現(accomplishment)；履行(the act of implementing)

詞根記憶：來自implement(v.實施；實現)

例：The procedures for congressional approval and implementation of federal Indian policy were made more precise.

同根詞：complement(v.補足；n.補足物)

8.implication n.含義(significance)；[常pl.]推斷，結論(conclude, deduce)

詞根記憶：來自implicate(v.暗示)

例：Some analysts believe that wage-work had other implications for women's identities and consciousness.

9.implicit a.含蓄的(hinted, indirect)；潛在的(potential)

聯想記憶：im(進入)+plic(重疊)+it--（意義）疊在里面--含蓄的

例：implicit conclusions舍蓄的結論 //an implicit contradiction潛在的矛盾

同根詞：explicit(a．直率的，清楚)