The story
- Proto-Indo-European*h₂erǵ-
- Proto-Indo-European*h₂érǵus
- Proto-Italic*argusder.?
- Latinarguō
- Old Frencharguer
- Middle Englisharguen
- English todayargue
From Middle English arguen, from Old French arguer, from Latin arguere (“to declare, show, prove, make clear, reprove, accuse”), q.v. for more. Displaced native Old English flītan and reċċan.
Etymology from Wiktionary, CC BY-SA 4.0.