To attack or act aggressively; to move toward or invade with hostile intent.
From Latin 'aggressus' (past participle of aggredi), combining 'ad-' (toward) and 'gradus' (step/grade). Literally means to step toward in a hostile way.
The Latin root 'gradus' also gives us 'grade,' 'gradient,' and 'progress' — all about stepping or moving — showing how 'aggress' literally means stepping toward someone in aggression.
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