aggressionyoudaoicibaDictYouDict[aggression 词源字典]
aggression: [17] The violent associations of aggression have developed from the much milder notion of ‘approaching’ somebody. The Latin verb aggredī ‘attack’ was based on the prefix ad- ‘towards’ and gradī ‘walk’, a verb derived in its turn from the noun gradus ‘step’ (from which English gets, among many others, grade, gradual, and degree).
=> degree, grade, gradual[aggression etymology, aggression origin, 英语词源]
aggression (n.)youdaoicibaDictYouDict
1610s, "unprovoked attack," from French aggression (16c.), from Latin aggressionem (nominative aggressio) "a going to, an attack," noun of action from past participle stem of aggredi "to approach; attack," from ad- "to" (see ad-) + gradi (past participle gressus) "to step," from gradus "a step" (see grade (n.)). Psychological sense of "hostile or destructive behavior" first recorded 1912 in A.A. Brill's translation of Freud.