词根：-rat-
【词根含义】：计算,思考
【词根来源】：来源于拉丁语动词reor, reri, ratus, sum(计算,思考)。
【同源单词】：irrational, overrate, rate, ratify, rating
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：-fy
【来源及含义】Latin: a suffix; make, do, build, cause, produce