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：pron-

【来源及含义】Latin: inclined, face down

【同源单词】pronate, pronation, prone, pronograde, pronometer, pronomos