1.derive v.(from)得到，得自(to take, receive, or obtain especially from a specified source);推論出(to infer, to deduce)

詞根記憶：de+rive( =river河流)一支流一得到

例:Most geologists believe that crude oil is derived from organisms buried under ancient seas.//The set of objective criteria is derived from these analyses.

派生詞：derivative(a．引出的)

2.descend v.下降(to come or go down);遺傳(to derive)

詞根記憶：de+scend(爬)--往下爬--下降：遺傳

例:A plane descended 2,000 feet from an altitude of 10,000 feet.

派生詞：descendant(n.子孫，后裔)

3.description n．描寫，描述(an act of describing)

詞根記億：de+script(寫)+ion--描寫，描述

例:vivid description生動的描述

4.desegregation n.取消種族隔離(the action or an instance of desegregating)

詞根記億：desegregate(v.取消種族隔離)，de(解除)+segregate(隔離)一解除隔離,取消種族隔離

例:School desegregation has worked well in Buffalo and New York.

5.detierve v.應受，值淶享(to be worthy of)

聯想記憶：de+serve(服務)--充分享受服務一應受，值得

例:American Indian poems have not yet attracted the scholarly attention they deserve.

6.designate v.指派(to appoint);指明，指定（to specify）

詞根記憶：de(起強調作用)+sign(標出)+ate --標出來--指明，指定

例:Each prisoner was made to designate the amount of ransom(黷金)to be paid for his return.

詞根記憶：designated(a．指定的，指派的)

7.desire v.渴望(to long or hope for);要求(to request)；n.愿望(longing)

詞根記憶：The politician desired power and would stop at nothing to get it.／／ Seeing or hearing an advertisement for a product tends to increase people's desire for that product.

派生詞：desirable(a．值得要的；令人滿意的)

8.despisev.輕視，輕蔑(to look down on)

詞根記憶：de(不)+spise( =spic看)一不值得看一輕視

例:Mary despised her rude neighbors.

9.detach v.分開，分離(to separate)

詞根記憶：de(去掉)+tach(接觸)一去掉接觸一分開

例:He had to detach himself from social activities in order to concentrate on his studies.

同根詞：attachment(n.附件;依戀)

10.detached a．不含個人偏見的(free from prejudice or self interest)

例:The tone of the passage can best be described as detached.