The story
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élyos
- Proto-Hellenic*ál͏̌l͏̌os
- Ancient Greekᾰ̓́λλος (ắllos)
- Englishallo-
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Indo-European*gʰredʰ-
- Latingradior
- Latinaggredior
- Latinaggressu
- Englishaggress
- Englishaggressive
- English todayalloaggressive
From allo- + aggressive.
Etymology from Wiktionary, CC BY-SA 4.0.