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：ag-

【词根含义】：来,临近;加强意义

【词根来源】：ad-的变体,用在g前。

【同源单词】：aggravate, aggregate, aggregation, aggress, aggression

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：-ive

【来源及含义】Latin: a suffix; tending to; of the quality of, inclined to

【同源单词】adhesive, adhesive, advertive, affirmative, aggressive, agitative