invade [ in- = into入；vad = to go 走；“to go into other's place 走入他人之地”→]v. enter with armed forces 侵入，侵略 / Soldiers invaded the country to conquer it.軍隊侵入該國以圖占領(lǐng)它。

invasion n. 入侵；侵略;闖入 

invasive a. 侵略的；侵害的

以下是幾個含il-，im-，ir-的原生詞。

illustrate [ il- (in-) = on 在…上；lustrate = to light 照=>“to light on sth. 照亮某物”→]v. make clear by stories, examples, etc. 說明，闡明 / These graphs illustrate the results of the experiment. 這些圖表說明了實驗的結(jié)果。

illustration n. 說明;圖解;例證；插圖 

illustrative a. 用作說明的；作為例證的

imbibe [ im- (in-) = in入;bibe = to drink 飲→]vt. drink in; absorb 飲入；吸收 / The roots of a plant imbibe moisture from the earth. 植物的根從土壤中吸收水分。

imbibition n. 吸收，吸人

irradiate [ir-(in-) = upon 在…之上；radiate = to shine 照射→] v. shine upon; make bright 照耀；使發(fā)光 / The midnight lightnings irradiate the heaven. 夜半的閃電照亮了天空。

irradiation n. 照耀，發(fā)光；闡明，啟發(fā)