Proto-IE: *ēgʷh-
Meaning: to drink, get drunk
Hittite: eku- / aku- (I) 'trinken'
Tokharian: A, B yok- 'trinken' (Adams 509)
Latin: ēbrius, -a, -um 'пьяный, хмельной; напоенный, напитанный'
Russ. meaning: пить, напиваться
References: Tischler 103-105 (with discussion)
Comments: The Hitt root has no relation to aqua, etc., having -kw-, not a -kkw-! Greek nḗphō 'bin nüchtern' rather belongs to *nāgʷh-.