最后介紹de-作為動詞性前綴與名詞結(jié)合的例子。

declass [ de- = to make down 使向下；class n. 階級=>“to make one's class downward 使某人的地位下降”→]vt. degrade or remove from one's class使降低或失去社會地位/ 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，因此他的社會地位就降低了。

degrade [ de- = to make down 使向下；grade n. 級別=>“ to make down from one's grade 使某人級別下降”→]vt. reduce to a lower rank 使降低，貶黜 / The sergeant was degraded to private for disobeying orders.那中士因為不服從命令被降為士兵。

degradation a .降級；貶酬；墮落

debark [ de- = to get away from 從…離開；bark n .船 ] v. get off a ship, aircraft, etc.下（船、飛機等），上岸，登陸 / After the passengers debarked in port, the captain debarked his crew.旅客上岸后，船長打發(fā)手下人下船。

derail [de- = to cause away from 使…離開；rail n. 鐵軌→]vt. cause to run away from the rails 使脫軌 / Several trains were derailed there last year.去年有好幾列火車在那里脫軌。

derailment n. 脫軌

deforest [de-=to remove 取走；forest n. 森林→] vt. remove the trees from; clear off forests 砍掉…的樹木；開發(fā)森林 / The land had to be deforested before the peasants could farm it 農(nóng)民 要先砍掉那塊地上的樹木，才能在上面耕種。

dethrone [ de- = to remove from 從…移走；throne n. 王位→] vt. remove from a throne or ruling 廢黜；罷免 / The rebels dethroned the weak king.起義者廢黜了無能的國王。 dethronement n. 廢黜；罷免