词根：plaud, plaus(plod, plos, plex) = strike（打, 击）, clap鼓掌
来自拉丁语的plaudere,plodere(=to strike,to clap)——英文字根字典 ,意为to strike,to clap。plod,plos,plex是它们的变形。同义词根来自拉丁语的bat,flict,cuss,fend/fens(fenc,fest),lid/lis等和来自盎格鲁-撒克逊语的sla。
同源词：
1. plausible （可以使其感动的 plaus(=strike)）
adj.看似真实的，似乎有道理的；花言巧语的
plausibility n.似乎有理，可信性
There are several plausible explanations for the current global climate changes.针对目前全球气候的变化有几种似乎合的解释。
2. applaud [ap-=ad- = to near + plaud 鼓掌]
v.鼓掌欢迎；向...喝彩；称赞，赞同 *ap<ad(=to,near)
3. applause [见上，-e 后缀 ]
n.鼓掌欢迎；喝彩；称赞，赞同 *ap<ad(=to,near)
general applause 全场喝彩
win the applause of the audience.赢得听众的喝彩
4. plaudit [plaud 鼓掌 + -it 后缀]
n.鼓掌喝彩；称赞
gratified at the plaudits of the audience 对听众的喝彩感到高兴
5. explode [ex- 出来 + plod 打 + -e 后缀 ]
v.使爆炸；爆发；（感情）迸发；推翻（意见、理论等）；戳穿；激增 *ex(=out)
explode a bomb 引爆炸弹
explode a superstition 破除迷信
exploded idea 被驳倒的意见
6. explosion [见上,-ion名词后缀 ]
n.爆炸；（愤怒、笑声等的）爆发；激增
population explosion after World War II 第二次世界大战后人口的激增
7. explosive [见上，-ive 后缀]
adj.易爆炸的，爆炸性的；爆发的
n.炸药，爆炸物 *ex (=out)
explosive substance 爆炸物
high explosive 高性能炸药，烈性炸药
8. implosion [im- = in 里面，内 + plos = plaud 打 + -ion 名词后缀 ]
n.（电灯泡等因为外力而发生的）内向爆炸
9. apoplexy [apo = away 离开 + plex = plaud 打 + -e 后缀 → 一个人的正常精神离开了正常状态，乱打七 → ]
n.中风，卒中 *apo(=away)
apoplectic adj. 中风的，患中风的；有中风迹象的，濒于中风的
cerebral apoplexy 脑卒中
词根：gon = to compare, to test, angle
来源于希腊语 gonia, 意为to compare,to test,angle。有异形同义词根：angul ,angl ,corn 角。
同源词：
1. paragon （来到旁边成为比较的对象 para(=beside) + gon(=compare,test,angle)）
n.模范，榜样，典范
Priestes are supposed to be paragons of virtue,though that's not always so. 牧师被认为是美国的典范，尽管实际上并非总是如此。
2. diagonal
n./adj. 对角线（的）；倾斜（的） *dia (=across)
3. trigonometry
n.[数]三角 tri (=three),metr<meter(=measure)
4. pentagon
n.五边形；(the P~)美国五角大楼 *penta(=five)
pentagonal adj.五边形的
Pentagon officials 五角大楼官员
5. hexagon
n.六边形；(the H~)法国（从地图上看，法国近似六边形） *hexa (=six)
hexagonal adj.六边形的
Within the Hexagon there are 96 departments. 法国有96个省。
6. octagon
n.八边形 *octa (=eight)
octagonal adj.八边形的
7. polygon
n.多边形 *poly(=many)
regular polygon 正多边形
词根：clud, clus(clos, clois, claus, clot) = to shut（关闭）
clud,clus是同源异形根，来源于拉丁动词claudere意为to shut（关闭）。clud来自不定式词干claud,常见于英语动词；clus 来自动名词词干claus,多见于相应的名词和形容词。clos,clois,claus,clot 是它们的变形。
同源词：
1. conclusive（一起关闭的 con<com(=together) + clus(=shut) + -ive）
adj.决定性的；确凿的；最终的
conclude v.下结论
conclusion （conclude 的对应名词：conclus = to conclude 结束，决定；-ion n. = the act or result 表示行为或结果 --> " the act result of concluding 结束，决定的行为或结果" -->）n.结论
conclusively adv.决定性地，最终地
The investigator presented conclusive evidence that the criminial was guilty. 那位调查员出示了确凿的证据，证明那个犯人有罪。
2. preclude（事先关上、关押起来pre(=before) + clud(=shut)）(pre预先,提前+clud关闭+e→提前关闭→阻止)
vt. 阻止，妨碍；排除；防止
preclusion n.排除；妨碍；防止
preclusive adj.排除的；妨碍的；防止的
Some medical conditions preclude getting facial cosmetic surgery. 某些医疗条件妨碍脸部整形手术的进行。
3. recluse（不露面，躲在里面过着封闭的生活 re(=back) + clus(=shut)）
n.脱离世俗的人；隐遁者
adj.脱离世俗的，隐遁的
My aunt is agoraphobic and something of a recluse. 我姑姑有广场恐惧症，活得像个隐士。
4. seclusion（脱离，过着封闭的生活se(=away) + clus(=shut)）
n.隔绝；隐退，隐遁
seclude v.隔绝；使隐退 (se分开+clud关闭+e→分开关→隐居的)
secluded adj.隔绝的；隐退的；偏僻的
She went into seclusion after the traffic death of her toddler. 自从她那蹒跚学步的孩子死于车祸后，她便过起了隐居的生活。
5. exclude （ex-(=out 外) + clud(=to shut关闭) + -e --> " to shut out 关在外面 " ）
v.拒绝（接纳）；排斥；排除（可能性）*ex(=out)
exclusion n.拒绝；排除
exclude all possibility of doubt 排除一切怀疑的可能性
6. exclusive
adj.排除的，除外的；孤傲的；（集团、团体）排他的；（商品）独家经营的；独占的，唯一的 *ex(=out)
exclusively adv.专有地；排他地；独占地
exclusive economic zone 专属经济区（缩写：EEZ）
exclusive right 专有权
7. include （in- (= in 内) + clud (= to shut 关闭) + -e -->" to shut in 关闭在内 " -->）
v.包含，算入 *in(=in)
inclusion n.包含，算入
This atlas contains fifty maps,including six of North America. 这本地图册共由50幅地图组成，其中包含6张北美地图。
postage included 包含邮资
8. including
prep. 包含，包括 *in(=in)
There are seven of us including myself. 把我算在内共有7个人。
9. inclusive
adj. (~of)包括的，包含的
inclusively adv.包括地，在内地
five inclusive of the driver 包括司机共5个人
10. disclose (dis分开,打开+clos关闭+e→把关的打开→揭发)
v.揭露，暴露，揭开，透露；分开 *dis(=not)
refuse to diclose one's name and address 拒绝透露姓名和地址
11. disclosure
n.暴露，透露；公开；被揭发的事 *dis(=not)
12. enclose (en进入+clos关闭+e→被关起来→包围)
v.围绕，（用围墙或栅栏等）围起来；封（信）；放入（纸袋、包裹），封入 *en(=in)
A check for 50 dollars is enclosed. 附上一张50美元的支票。
Enclosed please find a check for 50 dollars . 请收下附上的50美元支票。
13. enclosure
n.围绕；围栏；（特指随信一起）封入；封入之物
enclosure of common land 用围栏圈起一块公有土地
14. close (close=clos关闭→靠拢→近的→接近)
v.闭（眼）；关（门、窗等）；收起（伞）；合上（书）；封闭（通道、入口、小孔）；关闭（店铺等）；结束，终止；商定（交易）；靠拢，密集
n.（期限的）结束，（活动等的）终止；（四周围住的）场地；院子；死胡同
adj.（空间、时间上）接近的；（关系）密切的，亲密的；（在比赛中）势均力敌的，差异微小的；密集的；缜密的，周密的；吝啬的；（天气）闹热的；（房间等）通风不畅的，（空气）污浊的；隐藏的，非公开的
adv.接近地；紧密地；紧紧地
close a deal 成交
close call/thing/shave 侥幸脱险
close cut 捷径
close friend 密友
close relatives 近亲
close election/contest/match /finish 势均力敌的选举/竞争/比赛/结局
You are very close. 你已经接近正确答案了。
in close order 以密集队形
15. closed
adj.关闭的，密闭的，密封的；非公开的；排他性的
Closed today. 今日停业
closed-door 秘密的，非分开的 <-->open-door 公开的
closed primary 仅由一个政党的成员参加的预选
16. closing
adj.结尾的，结束的；闭会的 n.密封，封闭；终结，结束；结算
closing date 截止时间
closing address 闭幕词
17. closeness
n.接近；密集；亲密
the closeness of a resemblance 非常想像
18. closely
adv.密集地，紧紧地；接近地；精密地；精密地
listen closely 倾听
closely contested election 势均力敌的选举
19. closure (clos关闭+ure表名词→close的名词)
n.结束；终止；封闭；关闭
pit closures 闭坑
20. closet (clos关闭+et小东西→关的小东西→壁橱)
n. 壁橱；（旧用法）私室；书斋；厕所 adj.私人的；空谈的；关起门来的；秘密的
v.把...引进私室密谈 *et(=small)
closet thinker/strategist 纸上谈兵的空想家/战略家
closet theory 空谈理论
He was closeted with his advisor for two hours. 他和他的导师密谈了两小时。
21. cloture
n.结束；截止 v.结束辩论 *clot<clos(=shut)
22. cloister
n.修道院；（修道院、大教堂等的后院围成四角形的）有房顶的回廊；（the ~）隐居生活
v.使居于修道院中 *clois<clos(=shut)
live a cloistered life 过修道院的隐居生活
23. clause
n.（合约、法律文书等的）条目，条款；[语]从句
penal clause 处罚条款
clause by clause 逐条地
subordinate clause 从句
24. claustrophobia
n.幽闭恐怖（症） *phob(=fear)
25. mare clausum
n.领海（<-->mare liberum 公海） *mar(=sea)
26. occlude (oc一再+clude=clud关闭→一再关起来不畅通→堵塞)
v.闭塞,堵塞
词根：hab(hib) = to live, to have, to hold
来自拉丁语的hab意为to live,to have,to hlod。它的元音弱化开为hib。
（*拉丁文habere(=to have,to hlod,to keep)——英文字根字典）
同源词：
1. rehabilitate（重新拥有re(=again) + hab(=have,live)）
vt.使（出狱的人或病愈）恢复正常生活；使复职，复位；使恢复名誉；复原（老建筑等），修复；使复生
rehabilitation n.收复正常生活；复职；复位；恢复名誉
I strongly believe prisoners should be rehabilitated during their incarceration.我坚持认为，犯人们在监禁期间应该接受正确的管教。
2. inhabitant（在里面生活的人 in(=in) + hab(=live,have)）
n.居住于，居住者；（某地区）栖息的动物
inhabit v.居住于；栖息于
inhabitable adj.适合居住的
inhabited adj.有人居住的
There are only 7 inhabitants in this small apartment building.这座小公寓楼里只住了7个人。
3. habituate（使生活hab(=live,have)）
vt.使习惯于
Bears have become habituated to tourists as a primary food source.熊已经习惯将游客当作食物的首要来源了。
4. malady（具有不好的状态、恶性 mal(=bad) + ad<hab(=live,have)）
n.疾病；（社会的）弊病
My brother's a hypochondriac,always complaining of some malady or other. 我的弟弟是个忧郁症患者，经常抱怨有这样或那样的病。
5. inhibit（使不确定有 in(=not) + hib<hab(=have,hold)）
vt.抑制；禁止
inhibition n.抑制；禁止
inhibitive adj.抑制的；禁止的
I hate tight clothing,because it inhibits my movement.我讨厌紧身的衣服，因为它妨碍我的活动。
6. cohabit
v.（尤其指未婚男女）同居生活；共同存在 *co<com(=together)
cohabitation n.同居；共同存在
cohabitation politics 左右共治
7. habitable
adj.适合居住的
The old house is no longer habitable.这座老房子再也不适宜居住了。
8. habitual
adj.习惯的；习以为常的，惯常的
habitually adv.习惯地
habitude n.习惯，习俗；本性
habitual reader 养成读书习惯的人
habitual criminal 惯犯
his habitual seat at the dining-table 饭桌上他经常坐的位子
9. habitation
n.居住；住所，住宅
houses that were not fit for habitation 曾经不适合居住的房子
human habitation 人类的居住环境
10. habitat
n.（动、植物的）栖息地；原产地
natural habital 天然栖息地
11. habitue
n.<法>常客，回头客
habitue of the Restaurant Maxim 马克西姆餐厅的常客
habitue of the orchestral concerts 经常去听管弦音乐会的人
12. habit
n.习惯，习性；神职人员的服装；女子骑装
creature of habit 习惯的奴隶
monk's habit 僧服，法衣
riding habit 女骑装
13. exhibit
v.展示，阵列
n.（博物馆等的）展览品;阵列，展示；（提供给法庭的）证据 *ex(=out)
exhibitor n.（美术、花卉展等的）展览者
Don't touch the exhibits 请不要触摸展览品
exhibit A证据甲
14. exhibition
n.展览，阵列；展览会；（学识等的）表现，显示 *ex(=out)
exhibitionism n.表现癖
exhibitionist n.有表现癖的人；裸露癖患者
opportunity for the exhibition of one's knowledge 展示自己知识的机会
15. prohibi
v.禁止；阻止 *pro(=before)
prohibitive adj.禁止的，禁止性的；（价格）高得买不起的
prohibitive price 高得买不起的价格
prohibitory adj.禁止的
prohibitory laws 禁止法
Smoking strictly prohibited 严禁吸烟
16. prohibition
n.禁止；禁令；禁酒 *pro(=before)
prohibitionist n.赞成禁止的人；禁酒主义者
prohibition law [美史]禁酒令（美国于1920年到1933年实施）
prohibition against the sale of cigarettes to children 禁止向儿童出售香烟的命令。
词根词缀：a-, an-
【来源及含义】Greek: prefix; no, absence of, without, lack of; not
【相关描述】These prefixes are normally used with elements of Greek origin, a- is used before consonants and an- is used before vowels.
It affects the meanings of hundreds of words.
There are too many words that use these prefix elements to list all of them on this site; however, there are significant examples listed in this and the other units where they exist.
【同源单词】abacterial, abaptism, abarognosis, abasia, abiocoen, abiogenesis
词根词缀：-aceous, -acea, -aceae, -aceaen, -aceus
【来源及含义】Latin: a suffix; having the quality of, of the nature of, characterized by, belonging to, resembling
【相关描述】There are hunderds of words that utilize the -aceous suffix which are not shown here; however, the following will present important examples.
A suffix that forms adjectives and is used with technical combinations, especially in biological terms: "pertaining or belonging to, of the nature of, or characterized by; to be full of, to possess abundantly". The suffix -acea usually denotes "orders and classes in zoology" while the suffix -aceae usually denotes "orders and families in botany" and -aceaen is used to denote members of "orders of the animal kingdom".
【同源单词】acanthaceous, -aceous, alliaceous, ampullaceous, amygdalaceous, amylaceous
词根词缀：-acity
【来源及含义】Latin: suffix; quality of
【相关描述】A suffix that forms nouns of quality or state. There are hundreds of other -acity suffixes; however, the following will present significant examples.
【同源单词】audacity, bellacity, bibacity, capacity, carnivoracity, contumacity
词根词缀：-ation, -ization, -isation
【来源及含义】Greek > Latin: a suffix; action, act, process, state, or condition; or result of doing something
【相关描述】Although there are over 1,450 word entries ending with -ation or -ization listed in this unit, there are certainly many more which exist in the English language. At any rate, this unit provides a significant number of -ation and -ization examples for you to see.
【同源单词】abarticulation, abbreviation, abdication, abdominal examination, aberration, abevacuation
词根词缀：columba-, columb-
【来源及含义】Latin: pigeon or dove
【相关描述】There are an estimated 300 pigeon and dove species of near passerine birds (mainly perching songbirds) in the order Columbiformes. The terms "dove" and "pigeon" are used interchangeably, although smaller species are more likely to be called doves.
【同源单词】Austrocolumbia, Columba, columbaceous, columbarian, columbarium, columbary
词根词缀：grapho-, graph-, -graph, -graphy, -grapher, -graphia
【来源及含义】Greek: to scratch; to write, to record, to draw, to describe; that which is written or described
【相关描述】As indicated at the bottom of this page, there are a significantly large number of graphic word-entry groups in this unit. Such an extensive listing is provided to show how important the grapho- element is to the English language.
【相关词根词缀】Related "writing" word units: glypto-; gram-; scrib-, script-.
【同源单词】abdominal aortography, accelerograph, acoustic agraphia, acrography, actinograph, actinography