1.decorous a．符合禮節的(correct)

例:A reserved and decorous style had been a more highly valued literary ideal.

2.dedicated a．專注的(given over to a particular purpose)；獻身的(devoted)

詞根記憶：來自dedicate(v.獻身，致力)

例:Except for the most idealistic and dedicated, there were no incentives to seek change.

3.deduce v.推斷，演繹(to infer)

詞根記憶：de(往下)+duce(引導)--往下引導--推斷，演繹

例:Relative land ice volume for a given period can be deduced from the ratio of two oxygen isotopes.

4.deduct v.扣除(to subtract)；演繹(to infer)

詞根記憶：de+duct(弓I導)--往下引導--演繹

例:The waitress deducted the cost of the cold coffee from our bill.// deductive reasoning演繹推理

派生詞：圓deduction(n.扣除;演繹)：deductive(a.演繹的)

5.deduction n.扣除，減除(an act of taking away)；推論(the deriving of a conclusion by reasoning)

詞根記憶：來自deduct(v.扣除；推斷，演繹)

例:As a result, these companies have shifted health care costs to employees in the form of wage deductions or high deductibles.

同根詞：conduct(v.引導;管理)；induct(v.引導；傳授)

6.deem v.認為(to consider)；相信(to believe)

聯想記憶：別以為事情表面似乎(seem)是這樣，就認為(deem)八九不離十了

例:Native Americans recogni.zed that events that they thought significant were often deemed unimportant by their interviewers.

7.default v.違約（to fail to fulfilla contract, agreement, or duty）；拖欠(to fail to meet a financial obligation)

聯想記憶：de+fault(錯誤)--錯下去--拖欠

例:Bank failures are caused when big borrowers defarAt on loan repayments.

8.defendant n.被告(a person required to make answer in a legal action or suit)；a．為自己辯護的(being on the defensive)

詞根記憶：defend(保護)+ant--保護自己--被告

注意：plaintiff(n.原告)

例:a criminal defendant被告犯罪嫌疑人

9.deferential a．恭順的（respectful, humble）

詞根記憶：defer(遵從，聽從)--deference(遵從；尊敬)--deferential；注意這兒的defer不是“拖延”的意思

例:Bill is always deferential to his parents.

10.defiant a.蔑視的( bold)

詞根記憶：來自defy(發.藐視)

例:The hardliners are angrily defiant of the government's refusal and threaten to take action.