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

词根记忆：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.

派生词：derivative(a．引出的)

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

词根记忆：de+scend(爬)--往下爬--下降：遗传

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

派生词：descendant(n.子孙，后裔)

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

词根记亿：de+script(写)+ion--描写，描述

例:vivid description生动的描述

4.desegregation n.取消种族隔离(the action or an instance of desegregating)

词根记亿：desegregate(v.取消种族隔离)，de(解除)+segregate(隔离)一解除隔离,取消种族隔离

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

5.detierve v.应受，值涞享(to be worthy of)

联想记忆：de+serve(服务)--充分享受服务一应受，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）

词根记忆：de(起强调作用)+sign(标出)+ate --标出来--指明，指定

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

词根记忆：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)

词根记忆：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.

派生词：desirable(a．值得要的；令人满意的)

8.despisev.轻视，轻蔑(to look down on)

词根记忆：de(不)+spise( =spic看)一不值得看一轻视

例:Mary despised her rude neighbors.

9.detach v.分开，分离(to separate)

词根记忆：de(去掉)+tach(接触)一去掉接触一分开

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

同根词：attachment(n.附件;依恋)

10.detached a．不含个人偏见的(free from prejudice or self interest)

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