invest: in-(in)+vest(cloth)→投入，投資

　　investment: invest(投資)+-ment→投資

　　inland: in-(in)+land(陸地)→在內(nèi)地

　　involve: in-(in)+volve(轉(zhuǎn))→包含

　　investigate: in-(in)+vestigate(追蹤)→調(diào)查

　　incline: in-(to)+cline(傾斜)→傾向， 斜坡，斜面

　　insight: in-(in)+sight(視力)→洞察力

　　indulge: in-(towards)+dulge(be kind)→縱容

　　22. inter��=between, among

　　interfere: inter-(between)+fere(strike)→干涉,干擾

　　interference: interfer(e)+-ence→干擾，妨礙

　　interior: inter-(among)+-ior(表比較級)→內(nèi)部的

　　intermediate: inter-(between)+mediate(中間的)→中間的

　　internal: inter-(among)+-nal(…的)→內(nèi)部的

　　international: inter-(between)+national(國家的)→國際的

　　interpret: inter-(between)+pret(price)→解釋

　　interpretation: interpret+-ation→解釋，說明

　　interval: inter-(between)+val(wall)→間隔

　　23. over��=above(在…上面)，across(穿過), beyond(超過)

　　overall: over-(above)+all(所有的)→總體的

　　overhead: over-(above)+head(頭)→在頭頂上

　　overnight: over-(across)+night(夜)→一整夜的

　　overtake: over-(beyond)+take(跳越)→追上

　　overseas: over-(beyond)+sea(海)+s→在海外