【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