前綴de- 含義為down; to undo; to make down?
當(dāng)它與動(dòng)詞結(jié)合時(shí)，基本意思是to undo块茁，表示“做（與原動(dòng)詞）相反的動(dòng)作”唇兑。當(dāng)它與名詞結(jié)合時(shí)，基本意思是to make down or away露该，表示“降低，剝離琳疏，取走”等動(dòng)作有决。
具體示例有：
先觀察由de-與詞根結(jié)合的幾個(gè)具有代表性的例子。
1.decline? [de- = down 下空盼；clin = to bend 彎书幕；-e → " to bend down 彎下去"→]
? v. 下傾
? ex)The road declines at the turn. 到拐彎處路轉(zhuǎn)下坡了。
2.decrease? [de- = down 下揽趾；creas = to grow 變得]
? v. 減少台汇；減小
? ex) Hunger decreases as one eats. 吃東西時(shí)饑餓感就減少了。
3.debar? [de- = away 外篱瞎；bar = to shut 關(guān)→]
? vt. 排除苟呐；阻止
? ex)He was debarred from club membership because of the scandal. 因?yàn)槟羌舐劊痪銟?lè)部拒之門外俐筋。
4.detract? [de- = away 離牵素；tract = to draw 抽→]
? v. 減損；貶低
? ex)The ugly frame detracts from the beauty of the picture. 難看的畫框影響了這幅的美麗澄者。
?再介紹de-作為動(dòng)詞性前綴與名詞結(jié)合的例子笆呆。
1.declass? [de- = to make down 使向下请琳；class n.階級(jí)→]
? vt. 使降低或失去社會(huì)地位
? ex)The baron had some working-class relatives,so he was declassed. 男爵有一些屬于勞工階層的親屬，因此他的社會(huì)地位就降低了赠幕。
2.degrade? [de- = to make down 使向下俄精；grad n.級(jí)別 →使某人級(jí)別下降]
? vt. 使降低，貶黜
? ex)The sergeant was degraded to private for disobeying orders. 那中士因?yàn)椴环拿畋唤禐槭勘?/p>
3.debark? [de- = to get away from 從...離開(kāi)榕堰；bark n.船 →]
? v. 下（船竖慧、飛機(jī)等），上岸逆屡，登陸
? ex)After the passengers debarked in port,the captain debarked his crew. 旅客上岸后圾旨，船長(zhǎng)打發(fā)手下人下船。
來(lái)源：
詞根詞源字典 www.etymon.cn
