常见的词根
1) aer, ar, 含义是“空气，大气” aeroplane, aerial,
2) ag, act, ig, 含义是“做，动作” active, agent, reaction,
3) alt, 含义是“高”， altitude,
4) alter, altern, altr, 含义是“其它，变更” alternate,
5) bio, bi, bion, 含义是“生物，生命” biology, bionics(仿生学)
6) brev, bri, brief, 含义是“短” brief, abbreviation, abridge(节略)
7) cap, capt, cept, cip, 含义是“取，获” capture, except, concept, capacity
8) ced, ceed, cess, 含义是“行，让步” proceed, succeed, excess(过度)
9) centr, centr, 含义是“中心” concentrate, eccentric(偏心的)
10) clain, clam, 含义是“呼喊” claim, proclaim, exclaim
11) clos, clud, 含义是“闭合” conclude, enclose, include
12) col, cult, 含义是“耕耘” colony, cultivate, agriculture
13) cor, cord, 含义是“心” cordial, record, accord
14) curr, cur, cour, 含义是“跑，动作” current, occur, concurrence(同时发生)
15) dic, dict, 含义是“说，示” dictate, edit, indicate, predict
16) doc, doct, 含义是“教” doctor, document.nbsp
17) duc, duct含义是“引导，传导” introduce, produce, conduct, deduct( 推论)
18) fact, fac, fect, dic, dit, 含义是“做，创造” factory, effect, profit, faculty, perfect
19) fend, fens, 含义是“打，击” defence, offence
20) fer, 含义是“搬运，移转” ferry, transfer, defer(迟延)
21) fin, finit, 含义是“终，极” final, finish, confine
22) firm, 含义是“坚固” firm, confirm, affirm(断定)
23) fix, 含义是“固定” prefix, affix(附加)
24) flect, flex, 含义是“弯曲” flexible, reflex
25) flor, flour, flower, 含义是“花” flower, flourish
26) form, 含义是“形” uniform, formula, transform, reform, deform
27) forc, fort, 含义是“力，强度” force, enforce, effort
28) gen, genit, 含义是“生产，发生” generate, generation
29) gram, graph, 含义是“书写，记录” telegram, diagram, photograph
30) grad, gress, gred, gree, 含义是“步，阶段” gradually, degree, progress
31) hab, habit, hibit, 含义是“保持，住” inhabit, exhibit, prohibit
32) her, hes, 含义是“粘附” adhere, cohesion
33) ject, jet, 含义是“抛射” project, inject
34) jour, 含义是“日，一天” journal(日记), journey, adjourn(延期)
35) jug, junct, 含义是“结合，连合” conjunction, junction(连合)
36) labour, labor, 含义是“劳动，工作” labourer, elaborate, collaborate
37) lect, leg, lig, 含义是“挑选，采集” collect, select, lecture
38) lif, liv, 含义是“生活，生存” life, alive, live
39) loc, 含义是“场所，位置” location, dislocate(脱位)
40) long, leng, ling, 含义是“长的” length, prolong, linger
41) loqu, locut, 含义是“说话” colloquial, eloquent,
42) mand, mend, 含义是“命令” command, demand, recommend
43) man, manu, 含义是“手，手法” manage, manual
44) memor, menber, 含义是“记忆” memory, remember, memorial
45) mind, ment, 含义是“心” mind, remind, mental
46) merc, merch, 含义是“贸易” commerce, merchant