1) aer, ar, 含義是空氣，大氣 aeroplane, aerial,
2) ag, act, ig, 含義是做，動作 active, agent, reaction,
3) alt, 含義是高， altitude,
4) alter, altern, altr, 含義是其它，變更 alternate,
5) bio, bi, bion, 含義是生物，生命 biology, bionics
6) brev, bri, brief, 含義是短 brief, abbreviation, abridge
7) cap, capt, cept, cip, 含義是取，獲 capture, except, concept, capacity
8) ced, ceed, cess, 含義是行，讓步 proceed, succeed, excess
9) centr, centr, 含義是中心 concentrate, eccentric
10) clain, clam, 含義是呼喊 claim, proclaim, exclaim
11) clos, clud, 含義是閉合 conclude, enclose, include
12) col, cult, 含義是耕耘 colony, cultivate, agriculture
13) cor, cord, 含義是心 cordial, record, accord
14) curr, cur, cour, 含義是跑，動作 current, occur, concurrence
15) dic, dict, 含義是說，示 dictate, edit, indicate, predict
16) doc, doct, 含義是教 doctor,
17) duc, duct含義是引導，傳導 introduce, produce, conduct, deduct
18) fact, fac, fect, dic, dit, 含義是做，創造 factory, effect, profit, faculty, perfect