1.adapter n.适应者( one that adapts);适配器(an attachment for adapting apparatus for uses not originally intended)
词根记忆:来自adapt(v.使适应)
例:It has established itself as a supreme adapter in an era when the ability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.
同根词：adaptive(a.适应的)
2.addict n.有瘾的人(person who is unable to stop taking drugs, alcohol,etc.) v.矿使上瘾，使入迷(to devote or surrender(oneself) to something habitually or obsessively)
词根记忆：ad（加强）+dict(说，要求)一不断要求一使上瘾
例:drug addict吸毒成瘾者//The level of caffeine in the candy bars is enough to keep people addicted.
派生词:addictive(a.使人上瘾的)；addiction(n.上瘾，沉溺)
同根词：dictator(n.独裁者)：contradict(v.反驳)
3.addictive a.上瘾的( causing or characterized by addiction)
词根记忆：来自addict(v.使上瘾，使着迷)
例:The phenomenon of withdrawal has always been the crucial physiological criterion for distinguishing addictive from nonaddictive drugs.
4.addition n.添加，增加物(a part added)；加法(the act or process of adding)
词根记忆：add(加)+ition 一加法
例:The addition of another firm has a negligible impact on the intensity of competition.
派生词:additional(a.附加的，额外的)
同根词：addable(a.可增加的)
5.additive a.附加的(involving addition);n.添加剂(substance added in small amounts for a special purpose)
词根记忆：来自add(v.加)
例:Organic milk is produced without the use of chemical additives.
6.adept a.精通的，内行的( thoroughly proficient)
词根记忆：ad+ept(能力)--有能力的--精通的，内行的
例:Even the most adept forgers cannot duplicate all of the characteristics the program analyses.
7.adhere v.(to)粘附(to stick）；遵守，坚持（to give support or remain faithful to）
词根记忆：ad（表加强）+her(粘附)+e--+粘附
例:adhere to plans遵守计划
派生词:adherent(n.信徒)；adherence(n.粘着；忠诚)：adhesiveness(n.粘性)
同根词：inherent(a.与生俱来的)
8.adherence n.坚持(the fact of behaving according to a particular rule, etc.or of following a particular set of beliefs, or a fixed way of doing sth.)；依附(the act, action, or quality of adhering)；忠诚(fidelity)
词根记忆：adher(坚持：依附)+ence(名词后缀)_+依附：坚持
例:It may be easier to reach agreement on a particular course of action through decision-sharing, which will in turn tend to promote adherence to plans.
同根词：adherent(n.追随者;a.附着的)
9.adjacent a.邻近的，毗连的(adjoining）
词根记忆：ad+jacent(躺)--躺在附近--邻近的
例:Two zdjacent faces of the solid have areas of 15 and 24 respectively.
10.adjust v.调节，改变…以适应(to adapt)
词根记忆：ad+just(正确)--使正确--调节
例:The data have been adjusted to allow for differences in the ages of patients.//The Japanese government had failed to adjust to the needs of a changing economy.
派生词:adjustment(n.调节，调整)
同根词：justify(v.证明…为正当)