词根：test = witness（证据）
来自拉丁语的testis意为 witness。
同源词：
1. detest（在眼前看到脱离正常的事物 de(=from) + test(=witness)
vt. 厌恶，憎恶
detestation n.厌恶，憎恶
detestable adj.令人厌恶的
Many children detest the taste of Brussels sprouts. 许多小孩子都讨厌芽甘蓝的味道。
2. attest
v.证明，证实，是...的证据；（使）发誓 *at<ad(=to)
attest a signature 证明签名是真的
fests which attest to his strength of will 可证明他坚强意志的功绩
3. contest
n.竞争，竞赛；争论，论战，争辩 v.竞赛，争夺，竞争；争辩 *con<com(=together)
contestant n.竞争对手，竞争者
beauty / musical /speech contest 选美比赛/音乐比赛/演讲比赛
three-round featherweight contest （拳击）三轮的次轻量级选手比赛
4. intestate
adj.未留遗嘱的 *in(=not)
die intestate 死时未留遗嘱
5. pretest
n.预备考试 *pre(=before)
6. protest
v.抗议，提出异议；断言，主张 n.抗议，异议；主张 *pro(=forth,forward)
protest movement 抗议运动
protest march 抗议游行
7. protestation
n.断言，声明，主张 *pro(=forth,forward)
protestations of innocence /friendship 声明无罪/友好宣言
8. protestant
adj. 新教的，新教徒的 n.新教徒
protestantism n.新教，新教教义
Protestant Reformation 新教改革
9. testament
n.遗嘱；（T~）（基督教的）圣约书（Old/New Testament）
testamentary adj.遗嘱的，据遗嘱的
10. testamur
n.（英国大学）考试及格证书
testate
adj./n. 留有遗嘱的（人）
testator n.立遗嘱者
testatix n.女遗嘱人
11. testicle
n.(pl.)睾丸 *cle(=small)
12. testify
v.作证，证实，是...的证据，证明 *ify(=make)
13. testimonial
n.（能力、资格等的）证明书，推荐信；感谢信，表扬信；奖状，纪念品
14. testimony
n.[律]证词；（信仰等的）声明
give false testimony 作伪证
His poverty is a testimony to his innocence. 他的穷困证明他是清白的。
15. test
n.正文；原文（被编织的）
16. textile
adj.织物的 n.织物（的原料）
17. textual
adj. 本文的；原文的
18. texture
n.质地；组织；构造
19. textural
adj.质地的；组织上的
20. context
n.上下文；某事的前后关联（使和本文在一起的）《con- = together》
21. contextual
adj.上下文的；依前后关系的
22. contexture
n.组织；构造（共同织成）
23. subtle
adj.阴险的；微妙的；敏锐的（织法的精细）《sub- = beneath,closely》
24. pretext
n.藉口（眼前所编的话）《pre- = before》
25. subtlety
n.聪明；精微；阴险
26. tissue
n.[生理]组织
词根：cur, curs ( cor, cour, cours, coars) = to run
来自拉丁语的cur,curs 意为to run ,它们的变形为cor,cour,cours,coars。同义词根有来自拉丁语的lop,来自希腊语的drom,以及来自盎格鲁-撒克逊语的run。此外，还有意为vehicle 的car/char等。
（*拉丁文currere(=to run) —— 英文根字典）
同源词：
1. discursive（分开跑的dis(=apart) + curs(=run)）
adj.（人） 言行散漫的，不得要领的；离题的；推论的
discursiveness n.散漫，不得要领
discursively adv.散漫地
He gave a discursive speech,difficult to follow. 他说的话东拉西扯，让人难以理解。
2. concur（一起跑con<com(=together) + cur(=run)）
vi. with + sb;in + sth 同意，一致；同时发生；合作
concurrence n.同意，一致；合作；同时发生
concurrent adj.同时发生的；合作的；一致的
concurrently adv.同时地
I concur with my parents that illegal drugs carry many risks. 我同意我父母关于非法药品带有很大风险的意见。
3. precursor（事先、首先跑pre(=before) + curs(=run)）
n.预先，预兆；先驱者，先觉者；前往
precursory adj.先驱的；先觉的；预备的
It has been said the Poe's novels were precursors to the modern detective novel. 坡的小说被认为是现代侦探小说的先驱。
4. cursory（仿佛跑似的curs(=run)）
adj.（做事、阅读等）草率的，匆匆忙忙的，精略的
The customs agent gave only a cursory glance at our luggage. 海关人员是草草地看了一眼我们的行李。
5. recourse（向后跑re(=back) + cours<curs(=run)）
n.依靠，依赖；求助对象
The condemned man had no legal recourse left to him and was executed. 那个死刑囚犯没有任何法律求助途径，最终被处死。
6. extracurricular
adj.课外的 *extra(=outside)
extracurricular activities 课外活动
7. incur
v.招致，带来；背负（债务），蒙受（损失），遭受 *in(=into)
incur debts/hatred/great expense/danger/displeasure 负债/招致仇恨/花费大量经费/招致危险/触犯，得罪
8. occur
v. 出现，发生；（在心中）浮现；存在；被发现 *oc<ob(=to)
An idea has occurred to me. 我有了一个主意。
It occurred to me that~ 我想到...
9. occurrence
n.发生的事情、事件；出现，发生 *oc<ob(=to)
happy occurrence 喜事
10. recur
v.再发生，复发；回归，重新浮上心头，重新忆起 *re(=again)
problem which recurs periodically 定期反复出现的问题
11. recurrence
n.重新想起；复起，反复 *re(=again)
frequent recurrence of these headaches 这样的头疼的频繁复发
12. recurrent
adj.定期（频繁）重复的；复发的，周期性的 *re(=again)
recurrent expenses 定期开支
recurrent fever 回归热
13. undercurrent
n.底线，潜流；（不浮于表面的思想、感情等的）暗流 *under(=under)
undercurrent of opposition /melancholy 潜在的敌对/潜在的忧郁
14. curriculum
n.（学校、大学等）课程
curriculum vitae 履历
15. currish
adj.下贱的
16. current
adj.通用的，现行的；现在的，正在进行的；流通的 n.（电、水、气等的）流；（时间、舆论、思想等的）潮流，倾向，趋势
currently adv.通常地，普遍地；现在，目前
current money 通用货币
current news 时事新闻
go (swim)with(against) the current (of the times) 随波逐流（反潮流）
the current of time (the times) 潮流，时代潮流
air currents 气流
17. currency
n.通货，货币；流通，通用；流行，普及
gold/paper currency 金币/纸币
foreign currencies 外币
currency circulation 货币流通
Many slang words have short currency. 很多俚语的流行时间都非常短。
18. courier
n.送快信、外交信件的信使；（旅行社的）导游，向导 *cour<cur(=run),ier(=person who)
act as a diplomatic courier bringing an important message from the president for the new premier 以外交信使的身份向新任首相传达总统的重要信息
19. succour
n.（困难时的）援助，救助 v.帮助（困难的人），援助 *suc<sub(=under),cor<cur(-run)
20. corridor
n.走廊，回廊 *cor<cur(=run)
corridors of power 权力走廊；暗中左右决策的权力中心
Polish Corridor 波兰走廊
21. excursion
n.远足，短程旅行 *ex(=out)
excursionist n.运足者；短程旅行者
make an excursion to the mountain 去大山中运足
22. incursion
n.（多指非永久占领的）袭击，侵犯，入侵 *in(=into)
the Danish incursions on our coasts in early times 早期丹麦人对我们（英国）海岸的入侵
23. cursive
adj.（笔迹）草书的，草书体的
24. curse
v.诅咒，咒骂；(be cursed with)使因...而遭难
n.诅咒，咒骂；祸因，祸根；被诅咒的东西；(the ~)月经
cursed adj.被诅咒的；可恶的，可惜的
curse at a fate 诅咒命运
25. course
n.进程；道路；（赛跑、比赛的）跑道；进展，趋势；（行动的）方针，（行动的）方向；（边续的）课，（党校伯）课程，（大学的）科目；单位；讲座；（吃饭时按顺序端上来的一道道的）菜
v.以犬（灰狗）狩猎（特别是野兔）；（快速移动地）穿过；（液体的）流动 *cours<curs(=run)
coursing n.带着猎犬打猎（野兔）
courser n.猎狗；骏马
in due course 在今后适当的时候
a matter of course 理所当然之事，必然的结果
stay the course 坚持到底，不放弃
graduate course 研究生课程
a dinner of six courses 六道菜品（一般包括汤、鱼、肉、糖果、奶酪、甜点）
main course 主菜
Tears coursed down her cheeks. 泪水滑过她的脸颊。
26. concourse
n.（物品或人等的）集合；合流；集合场所；（站、机场、会馆等的）中央大厅，中央广场 *con<com(=together),cours<curs(=run)
unforeseen concourse of circumstances 未能预料到的各种情况的同时发生
27. intercourse
n.（个人间的）交往；（人、国家间的）往来；（意见等的）交换；性交 *inter(=between),cours<curs(=run)
social /sexual intercourse 社交/性交
our commercial intercourse with the Soviet Union 我国与前苏联的贸易往来
28. coarse
adj.粗劣的；（布、网等）质地粗糙的；粗俗的，下流的 *coars<curs(=run)
coarse food 粗粮
coarse joke 低价的笑话
29. decurrent
adj.（叶等）从茎下部向上生长的《de- = down》
30. transcurrent
adj.横亘的；横贯的《trans- = across》
词根：pos
pos =put放置
expose [ex-出，外，pos放，摆;’摆出来”→把…亮出来] 揭露，揭发，使暴露
exposure [见上，-ure名词后缀] 揭露，揭发，暴露
compose [com-共同，一起，pos放;’放在一起”→组合在一起] 组成，构成，创作
composition [见上，-ition表示物;’构成的东西”，’创作出来的东西”] 作文，作品，乐曲
preposition [pre-前，-pos放置，-ition表示物;’放在(名词)前面的词] 前置词，价词
oppose [op-相反，相对，pos放置;’置于相反位置或立场”] 反对，反抗，对抗
opposition [见上，-ition名词后缀，表示作为，情况] 反对，反抗，对立，相反
opposite [见上，-ite形容词后缀，…的] 相反的，对立的，对面的
dispose [dis-分开，pos放;’分开放置”，’分别摆设”] 布置，安排，配置，处理
disposal [见上，-al名词后缀，表示行为，事情] 布置，安排，处理
disposition [见上，-ition名词后缀] 布置，安排，处理
propose [pro-向前，pos放置→呈;’向前呈”，’呈出”] 提出，提议，建议
proposal [见上，-al名词后缀，表示事物，行为] 建议，提议，(建议等的)提出
proposition [见上，-ation名词后缀] 建议，提议，提出
pose [pos放置→摆放] 摆(好)姿势，摆样子，装腔作势
posture [pos放置→摆放，-ture名词后缀;’摆出的姿势”] 姿势，姿态
reposit [re-回，pos放;’放回去”] 保存，贮藏;[‘放回原处”] 使复位，使返回原处
reposition [见上，-ion名词后缀] 贮藏，复位，回原处
purpose [pur-(por-的变体)前面，pos放;’放在自己前面的…”，’that which one places before himself as an object to be attained”→intention] 目的，意图，打算，意向
position [pos放置，-ition名词后缀;’放置的地方”] 位置
interpose [inter-中间，pos放置;’置于其中”] 插入，介入其中，干预
transpose [trans-转换，改变，pos放置] 使互换位置，调换位置
deposit [de-下，pos放;’放下”→存放] 寄存，存放，存款，储蓄
depose [de-下，pos放;’往下放”→使降下] 罢…的官，废黜，免职
deposition [见上，-ition名词后缀] 免职，罢官，废黜
词根词缀：-ability
【来源及含义】Latin: suffix; expressing ability, capacity, fitness, or "that which may be easily handled or managed"
【相关描述】Just a few examples out of hundreds of words presented as the noun forms of -able; forming nouns of quality from, or corresponding to, adjectives in -able; the quality in an agent that makes an action possible. The suffix -ible has related meanings.
【同源单词】absolute permeability, absorbability, accountability, achievability, acquirability, adaptability
词根词缀：-able
【来源及含义】Latin: a suffix; expressing capacity, fitness to do that which can be handled or managed, suitable skills to accomplish something; capable of being done, something which can be finished, etc.
【相关描述】A suffix that forms adjectives. The suffix -ible has related meanings; expressing ability, capacity, fitness; capable of, fit for, able to be done, can be done, inclined to, tending to, given to.
This list is only a small sample of the thousands of -able words that exist in English.
【同源单词】abdicable, -able, abolishable, abominable, abradable, acceptable
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：acerb-, acerbo-; acri-, acrid-
【来源及含义】Latin: bitter, sharp, sour, stinging
【相关描述】Formed from a blend of Latin acer- (feminine acris, neuter acre) which are both related to Latin acus, "needle"; acies, "sharp edge, point, the front of an army, line of battle, battle array"; and acuere, "to sharpen".
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "sour, sharp": aceto-; acid-; acies- (not "sour"); acuto- (not "sour"); oxy-; pung- (not "sour").
【同源单词】acerbate, acerbic, acerbity, acerbophobia, acerophobia, acerose
词根词缀：ad-
【来源及含义】Latin: prefix; to, toward, a direction toward, addition to, near, at; and changes to: ac-, af-, ag-, al-, an-, ap-, aq-, ar-, as-, at- when ad- is combined with certain words that begin with the letters c, f, g, l, n, p, q, r, s, and t
【相关描述】The form ad- appears in this form before a vowel and before the consonants d, h, j, m, and v. It is simplified to a- before sc, sp and st.
Before c, f, g, l, n, p, q, r, s, and t; ad- is changed to ac-, af-, ag-, al-, an-, ap-, aq-, ar-, as-, and at-.
In other words, the d of ad usually changes into the same letter as the first letter of the following root or word when it is a consonant: ad-fix becomes affix, and ad-sign becomes assign; therefore, making a double consonant.
Another example includes: attract as with ad-tract (drawn towards); so it has a double t. On the other hand when ad- precedes a vowel, as with adapt, it is simply ad-apt, with one d. For the same reason, there is only one d in adore and adumbrate, because ad- has combined with orare and umbra each of which starts with a vowel.
So, remember: since these Latin words begin with vowels and not consonants, the d of ad does not double as shown in the previous examples.
【同源单词】a capite ad calcem, Ab ovo usque ad mala, Ab uno ad omnes, Abiit ad majores, abjure, accede
词根词缀：alcoholo-, alcohol-, alcoho-
【来源及含义】Arabic > Latin: alcohol, originally an "essence or very fine powder"
【相关描述】A finely pulverized antimony ore or metallic powder used for painting the eyelids that is related to Hebrew kahal.
The term comes from Arabic al-kuhl which is from al-, "the" and kohl or kuhl, "antimony sulfide".
【同源单词】alcholimetric, alcholizer, alcholometrical, alcogel, alcohol, alcohol
词根词缀：alg-
【来源及含义】Latin: seaweed
【相关描述】Don't confuse this Latin element with the Greek element alg-, algo- which means "pain".
【同源单词】aerohygrocola, alga, algicide, algin, alginate, alginic acid