The story
- Proto-Indo-European · derived from*(s)leh₁g-
- Proto-Celtic · derived from*laggos
- Old Irish · derived fromlac
- Irish · borrowed fromlag“weak”
- English todaylage
Probably from Irish lag (“weak”), from Old Irish lac, from Proto-Celtic *laggos, from Proto-Indo-European *(s)leh₁g-.
Etymology from Wiktionary, CC BY-SA 4.0.