词根：cis(cas, chis), cide = to cut（切）
cis和cid是一对同源异形根，来自拉丁动词caedere, 意为 to cut（切）。cid是不定式词干，cis是动名词词干。其变形为cas 和chis。同义词根有来自拉丁语的torn(tem) ,scind/scis,sect,sever,tail,tons,trench,cop/coup等。
同源词：
1. concise（好好地切的 con<com(=intensive) + cis(=cut)）
adj.简洁的；简明的
conciseness n.简洁
concisely adv.简洁地
Class,please write concise answers to the essay questions. 同学们，请简要写出这篇文章问题的答案。
2. excise（切掉 ex(=out) + cis(=cut)）
vt. 切除；删除
n.国内消费税，货物税
excision n.切除；删除
He insisted that the violent scenes be excised from the film. 他坚持应删除电影中的暴力场面。
3. incisive（砍向里面或内部的 in(=in,into) + cis(=cut) + -ive 形容词后缀）
adj.锐利的，尖锐的；激烈的；敏感的；果断的
incision n.切割，切开；切口
incisor n.门牙
incise v.切割；雕刻，铭刻 《in- = in》
She's an incisive editor and cuts right to the bone. 她是一个果断的编辑，修改删节大刀阔斧。
4. circumcision
n.（尤其指犹太等为男婴施行的）割礼；割包皮 *circum(=around)
circumcise v. 为...割包皮；为...行割礼
He was never circumcised,and i feel his uncircumcised penis is a turn off to women. 他没有做过包皮切除手术，我想女人们因此而离开他。
5. decisive
adj.决定性的，决定的；坚决的；确定的 *de(=down)
decisively adv.决定性地
decisive battle 决战
decisive evidence 确证
decisive ballots 决选投票
6. precis
n. <法>大意，概略，摘录 *pre(=before,intensive)
vt. <法>为…写摘要，概括…的大意
7. precise
adj.精确的；确切的；细致的，严格；刻板的 *pre(=before,intensive)
precise measurements 精确的测量
a very precise man 非常刻板的人
8. precisely
adv.精确地；一丝苟地；（用于肯定回答）对，确实如此
9. chisel
n.凿子，凿刀 v.用凿子凿、刻、雕 *chis<cis(=cut)
10. castration
n.阉割，删改 *cas<cis(=cut)
castrate v.阉割；删改
11. fratricide
n.杀害兄弟姐妹者《fratri = 拉丁文frater = trother》 cf.fraternity （手足之情）
12. insecticide
n.杀虫剂《insect = 昆虫》
13. matricide
n.杀母者《matr = 拉丁文 mater =mother》 cf.maternity （母性）
14. patricide
n.杀父者 《patri = 拉丁文 pater =father》 cf.paternity （父性）
15. suicide
v.,n. 自杀（者）（将自己切割）《拉丁文su- = self》
16. bactericide（bacteri = bacteria 细菌；-cide n. = killer 杀...剂）
n. 杀菌剂
bactericidal adj.杀菌的
词根：bar = bar（横木）
来自拉丁语的bar 意为bar。
（*拉丁文barra(=bar) —— 英文根字典）
同源词：
1. embargo（在某物内放入障碍物、棒子em<en(=in) + bar(=bar)）
n.禁止通商；禁港令；禁止
vt.禁止船只出入港口；禁止通商
The U.S. has long enforced a trade embargo against Cuba. 美国对古巴实施了长时间的贸易禁运政策。
2. barrage（像棒子一样长或连续bar(r)(=bar)）
n.弹幕；一连串; 渠，堰
The soldiers sprinted through a barrage of gunfire,miraculously unharmed. 战士们穿过密集的火力进攻，竟然奇迹般地豪发未伤。
3. debar
v.排除，阻止 *de(=down,intensive 加强语气)
4. embarrass
v.使窘迫，使局促不安 *em<en(=in)
embarrassing questions 使人为难的问题
embarrassed by lack of money 因缺钱而窘迫
5. embarrassment
n.为难，困窘；使人为难的事 *em<en(=in)
financial embarrassments 财政困难
embarrassed of riches 钱多得不知如何花
6. barbecue
n.烧烤用架；（牛、猪等的）烤全性；吃烧烤食品的野餐会 v.烤全牲
barbecue sauce 烤肉汁，由醋和调味料制成
7. barrack
n.(pl.)兵营，军营；（临时性的）木板房；简陋的房屋
break barracks 逃离军营
8. barrel
n.（木头、塑料制的）桶；一桶的量；枪管；钢笔的墨水管 v.装入（装满）桶内
barrel-roofed vault 筒形穹顶
barreo organ 手摇风琴
9. barricade
n.栅栏；路障 v.设栅栏、路障
The radicals barricaded the road with desks and chairs. 激进分子用桌椅封锁了道路。
10. barrier
n.栅栏；屏障；阻碍，障碍（物）
language barrier 语言障碍
barrier to progress 进步的障碍
11. barrister
n.出庭律师
cf. solictor <英>初级律师 attorney-at-law <美>律师
12. bar
n.棒；栅；障碍；律师业；法院；酒馆
v.用闩关住；阻碍；饰以条纹 prep. 除...之外
词根词缀：loutro-, loutr-
【来源及含义】Greek: bath, bathing
【相关描述】A discussion about the above words appeared in the April 19, 1993, issue of The Christian Science Monitor in an article, "Dictionary Service Answers Questions About Words" (page 14) that described an organization known as "OWLS" [Oxford Word and Language Service]. One writer wrote, "Please can you tell me the word for a person who drinks their [sic] own bath water, as opposed to one who drinks another's bath water?" These words do not exist in any dictionary. Part of the OWLS' reply read: "As the concept is not central to European civilization, I am not surprised that it has failed to find a place in dictionaries. If words for this are needed in the future, then autoloutrophilist and alloloutrophilist are waiting in the wings for their brief flash of celebrity."
【同源单词】autoloutrophilist, louter, loutrophoros