高中英语词根词缀前缀课件.pptx

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1、de-di-de-除去dehairdefogdefrostdehumanizedecodedegreasede-往下depressdeposedescenddecreasedeclinedevaluedepreciatedemotedeterioratedetainderidededucedepositdejectdepress depress sb.The rainy days always depress me.The little girl depressed the button.按下The drought depressed the water level in the reserv

2、oirs.使降低depressed depressing depressive depression depose pose:摆放，位置 v.罢黜；罢免 depose sb.The head of state was deposed by the army.descend scend:攀爬（向下攀爬）：vi.下降；遗传 So I can descend to considerable depths.所以我可以下降至海底很深的地方。He is descended from an honorable family.他是名门望族的后裔。descendant 后裔 decline cline:倾斜（向

3、下倾斜）：v.下滑；下降；谢绝（邀请等）I declined with much regret your kind invitation.很遗憾,我不能接受您的盛情邀请。The decline of sales embarrassed the company.销路下降使公司陷于财政困难。devalue precious/valuablev.（使）贬值 We say that the dollar has depreciated.The value of foreign diploma has depreciated.appreciate depreciate（使）增值；欣赏（认识到.的价值）；

4、感激（不加人）；理解，认识到Gold has recently appreciated and will continue to appreciate in the months ahead.She showed an appreciation of my help.She had no appreciation of the difficulties we were facing.There is a growing appreciation of the need for change.demotemote(motion):移动（向下移动）：vt.使降级 反义词？promote deter

5、iorateteriorterrorterrible恐怖；恐惧vi.恶化恶化His health had deteriorated while he was in prison.Mental and physical deterioration both occur naturally with age.随着年龄的增长，心智和体力自然衰退。detaintain:拿（向下拿下）：vt.扣押；拘压 阻止；耽搁 The bad weather detained us for several hours.Three men were detained as suspects.derideride:骑d

6、eride sb.（把某人骑在自己的下面）：vt.嘲笑；嘲弄嘲笑；嘲弄SYN:mockdeduceduce,duct:管道；疏导（向下疏导）：vt.推断；推理推断；推理The method was deduced from experiments.这个方法是经过实验推论出来的。deposit（向下放置它）：n.沉淀物；积蓄；定金沉淀物；积蓄；定金dejectject：仍；投；掷；抛vt.使沮丧使沮丧de-表否定defacedeformdestructivedenationalizedeclaimdevastatedehiredefusedecomposedetachdeportdegenera

7、tedemeritdefacevt.损伤外观，丑化损伤外观，丑化deface a desk by marking on itdeformvt.使成畸形；使变形使成畸形；使变形A deformed body may have a beautiful soul.身体虽残缺身体虽残缺,心灵可美好。心灵可美好。destructiveadj.破坏性的破坏性的,毁灭性的毁灭性的Policies that are destructive to economic development should be abandoned.declaimclaim：声称；宣称：声称；宣称vt.谴责；言辞攻击谴责；言辞攻击S

8、he was declaiming against the waste of the taxpayers money.devastatevast：辽阔的：辽阔的vt.毁坏；破坏毁坏；破坏SYN:destroy,ruindehirehire：雇佣：雇佣vt.解雇解雇defusefuse：(词根词根):注入注入 （名词）：导火索（名词）：导火索vt.拆除导火索；拆除导火索；平息怒火，使平息，镇静平息怒火，使平息，镇静The bomb blew up as experts tried to defuse it.The two groups will meet next week to try to

9、defuse the crisis.decomposevt.&vi.(使某物使某物)变坏变坏,腐烂腐烂Most animals decompose very quickly after death.The eggs began to decompose after a day in the sun.detachattach:系上；贴上；附属系上；贴上；附属The hospital is attached to that university.vt.分离；派遣分离；派遣Men were detached to defend the pass.已经派遣了人员去防守关隘。已经派遣了人员去防守关隘。T

10、he handle is detachable from the bag.手柄可以从包上取下来。手柄可以从包上取下来。deportvt.驱逐出境驱逐出境degeneratevt.堕落堕落di-double;twice 双dioxidedilemmadiplomadioxideoxygen:氧氧二氧化物二氧化物carbon dioxidedilemma“喇嘛喇嘛”n.进退两难，左右为难进退两难，左右为难,窘境窘境He was thrown into a dilemma.diplomaDiplomas were conferred on members of the graduating class.n.文凭文凭Thanks