词根：-grad-, -gress-

【词根含义】：步,级

【词根来源】：来源于拉丁语名词gradus(步)和拉丁语动词gradior, gradi, gressus, sum(步行)。

【同源单词】：centigrade, degrade, downgrade, gradation, grade

前缀：re-

【词根含义】：再,重复;回,向后;相反,反对;离开

【同源单词】：arrest, correlate, correlation, correspond, correspondence

词根词缀：grad-, -grade, -gred, -gree, -gress

【来源及含义】Latin: walk, step, take steps, move around; walking or stepping

【同源单词】ad eundem gradum, aggradation, aggression, aggressive, aggressively, aggressiveness

词根词缀：re-, red-

【来源及含义】Latin: back, backward, again; used as a prefix

【同源单词】recalcitrant, recant, recapitulate, recapitulation, recede, receipt