The story
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Indo-European*gʰredʰ-
- Latingradior
- Latinaggredior
- Latinaggressu
- English todayaggress
From Latin aggressum, past participle of aggredi (“to attack, assail, approach, go to”), from ad (“to”) + gradi (“to walk, go”), from gradus (“step”); see grade.
Etymology from Wiktionary, CC BY-SA 4.0.