aggressionyoudaoicibaDictYouDict
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 (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.