词根：sem(sembl), sim(simul, simil) = same, like, equal
词根sem来源于拉丁语的semol，词根sembl是sem的变体;sim来源于拉丁语的similis=(like)，simil，simul是sim的变体，simil元音弱化后就变成了simul。以上所有词根及其变体都有“same（相同），like（类似），equal（相等）”的意思。与这些词根的同义词有来源于拉丁语的equ,par,ident等和来源于希腊语的tauto。
同源词：
1. assimilate [使几乎相同as<ad(=to, near)+simil(=same)]
vt.使同化；把…比作；消化；理解
assimilation n. 同化；消化
lt's difficult to assimiiate so much information in a 1-hour lecture. 用一个小时的课程来消化这么多的信息是有难度的。
2. dissimulate [使不相同dis(=not) + simul<simil(=same)]
vt. 掩饰（情感、动机等）；装假
dissimulation n. 掩饰；装假
Susan's efforts to dissimutate her feelings of inadequacy are a sign of immaturity. 苏珊试图掩饰自己无法胜任的感觉，这说明她还不够成熟。
3. simulate [使相同simul<simil(=same)]
vt.假装；模仿；模拟
simulation n.假装；模仿；模拟
simulator n.（为实验准备的）模拟装置
I only simuiate interest in her lectures because I think she's actually boring. 我只是假装对她的讲座很感兴趣，因为我觉得她实际上很无聊。
4. facsimile
n.（笔迹、印刷品、藏等的）摹本；[电信]电传真 *fac(=make)
5. similarity
n.类似（点），相似（处）
6. similar
adj.类似的
similarly adv.类似地；一样地
7. simile
n.明喻，直喻
8. similitude
n. 类似，相似
9. simulacrum
n.幻影：假象 *acr(=sharp)
10. simultaneous
adj.同步的，同时发生的
simultaneously adv.同时地
simultanerty n. 同时发生；同时完成
simultaneous interpreter 同声传译员
11. resemble [re- 再，sem 相同，-le后缀]
v.相似（再看也感觉相同）
resemblance n. [见上，-ance名词后缀]
12. verisimilar [ver(i) = true]
adj. 像真实的；可能的（像真的）
verisimilitude n.似真；好像真实；逼真
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：sembl = same, equal
来自拉丁语的sembl 意为same,equal。同义词根有来自拉丁语的equ,simil/simul,ident 以及来自希腊语的tauto。
同源词：
1. dissemble（使不一样dis(=not) + sembl(=same)）
vt. 隐藏，伪装
dissembler n.伪善者，伪君子
He dissembled when he claimed to be sick. 他说身体不适，其实是装的。
2. assemble
v.聚集，召集；装配（机器）*as<ad(=near)
3. assemblage
n.集合，集会；组装；集合物；群众，会众 *as<ad(=near)
4. assembly
n.集会，会合；会议；（韩国、法国等的）国会；（汽车等零件的）组装；（军队的）集合号 *as<ad(=near)
National Assembly 国会
unlawful assembly 非法集会
assembly hall 会场；装配厂
assembly line （工厂产品的）
awwembly plant 装配厂
5. ensemble
n.整体，召集；装配（机器） *en(=into)
6. resemble
v.和...相似 *re(=again)
7. resemblance
n.相似，想象，相似点 *re(=again)
8. semblance
n.相似
词根：simil, simul, sembl = alike, same , 表示“相类似, 一样”
similar a. 同样的；相似的
similarity n. 类似（similar相似的+ity)
simile n. 直喻，明喻
similitude a. 类似，相像（simil+itude)
assimilate v. 同化；贯通（as不断+simil+ate→不断相同→同化）
dissimilar a. 不同的（dis不+similar相同的）
dissimilation n. 异化；分化作用（dis+simil+ation)
facsimile n. 誊写，摹写（fac事实+simile→实际一样→誊写）
verisimilar a. 貌似真实的；逼真的（veri[very]+similar→非常相像的）
simulate v. 假装；模仿（simul+ate→做得相像→模仿）
simulation n. 假装（wimulate+ion)
simultaneous a. 同时发生的（simult+相同+aneous→[时间]相同的）
simultaneity n. 同时性（simult+aneity)
semblance n. 类似；外观相像（sembl+ance→相同之处）
assemble v. 集合；装配（as不断+semble→不断使东西相同→组装[东西]）
dissemble v. 假装，掩饰（dis不+semble→不相同装做相同→掩饰）
resemble v. 类似， 像…一样（re 再+semble→再一样→类似）
resemblan n. 类似（resemble+ance)
词根词缀：alumino-, alumin-
【来源及含义】Latin: aluminum [U.S.] and aluminium, [British]
【相关描述】This term was coined in 1812 by its discoverer, the British chemist Sir Humphry Davy, as an alteration of the earlier [1808] New Latin alumium, that was also coined by Sir Davy from alumina, a mineral occurring in nature as corundum plus -ium, a suffix meaning, in this case, "metal").
The variant form aluminium, which is preferred in British usage, also appeared in 1812 as a deliberate alteration of aluminum in order to eliminate confusion because of the partial resemblance to other names of certain elements, such as sodium, potassium, and magnesium, all of which were coined earlier by Sir Davy.
【同源单词】aluminate, alumine, aluminium, Aluminoid, aluminosis, aluminothermy
词根词缀：-aster, -astering, -asterism, -astery, -astress, -astry
【来源及含义】Latin: something that is inferior, small, or shallow; expressing incomplete resemblance
【同源单词】criticaster, hereticaster, historiaster, Latinitaster, logicaster, mathematicaster
词根词缀：balustrad-, balust-, balaust-
【来源及含义】Greek balaustion > Latin balaustium: supporting post of a railing on a balcony, staircase, etc. Borrowed from Italian balaustro, from balaustra; so called because of the resemblance of a baluster to the double-curving calyx tube of the "wild pomegranate flower".
【同源单词】baluster, baluster measure, baluster stem, balustered, baluster-shaft, balustrade
词根词缀：-esque
【来源及含义】from Proto-Germanic -iskaz, Vulgar Latin -iscus, Italian -esco, and then French -esque: a suffix forming adjuectives and indicating "resemblance, style, manner, or distinctive character, etc., of"
【同源单词】arabesque, arboresque, Bunyanesque, burlesque, centauresque, gigantesque
词根词缀：-ish
【来源及含义】Old English: a suffix meaning, characteristic of, like, tending to; of or relating to, from; somewhat, approximately; or a verb ending
【相关描述】A suffix used to form adjectives from nouns and from adjectives. It refers to "relation, resemblance, similarity", and sometimes has a diminutive force; such as, "selfish, boyish, brutish; whitish, somewhat white".
A verb ending, originally appearing in certain verbs of French origin; such as, "abolish, cherish, finish, furnish, garnish", and "impoverish".
【同源单词】abolish, accomplish, acutish, admonish, anguish, anguish
词根词缀：larvi-, larv-
【来源及含义】Latin: insect in its grub stage; from Latin larva, "mask" and by extension, "ghost", the idea being that an insect in its grub stage is merely a ghost of its future self and bears no resemblance to its future form
【相关词根词缀】 A cross reference of other word family units that are related directly, or indirectly, with: "insects, bugs, worms; invertebrates": aphidi-; api-; ascari-; culci-; Dung Beetle Survival; Dung Beetles Important; Eating Worms; entomo-; formic-; Guinea worms; helmintho-; insecto-; Insects: Importance; isopter-; lepidopter-; meliss-; mosquito; Mosquito, other Languages; Mosquitoes, Pt. 1; Mosquitoes, Pt. 2; myrmeco-; scarab; scoleco-; sphec-; taeni-; termit-; vermo-.
【同源单词】larva, larval, larvate, larvicide, larvicole, larviparous