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:uni-, un-
【来源及含义】Latin: one, single; a word element for number 1
【同源单词】disunion, disunionism, disunionist, disunite, disunited, disuniter