词根：-cert-
【词根含义】：确信
【词根来源】：-cern-和-cert-来源于拉丁语动词cern.o, cern.ere, crevi, cret.us/cert.us(判断,区分),从“判断/区分”引申出“确信”的含义。
【同源单词】：ascertain, certain, certainly, certainty, certificate
词根词缀：cern-, cert-, cer-; cret-, creet-, cre-
【来源及含义】Latin: to separate, to sift, to distinguish, to understand, to decide, to determine; separated, separation, to set apart; the glandular extraction or the movement out of a natural substance
【相关描述】Used to express the ability a person has to distinguish, or to perceive, something with the eyes and the mind. Related to crit-; as in criticize, diacritical, critique, etc.
【同源单词】ascertain, ascertainable, ascertainment, certain, certainly, certainty
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