词根词缀：fac-, facil-, fact-, feas-, -feat, -fect, -feit, -facient, -faction, -fic-, -fy, -ficate, -fication

【来源及含义】Latin: to make, to do, to build, to cause, to produce; forming, shaping

【同源单词】Ab officio et beneficio, abortifacient, absorbefacient, absorbifacient, acoustoelectric effect, affair

词根词缀：frug-, fruct-

【来源及含义】Latin: fruit; from Old French fruit, from Latin fructus, "fruit, produce, profit" from frug-, stem of frui, "to use, to enjoy" (cognate with Old English brucan, "to enjoy"

【同源单词】fructescence, fructicole, fructiferous, fructification, fructifier, fructify