Groggy comes from English grog plus the Middle English suffix -y, derived from Middle French -ie, Latin -ia, Latin -ivus, and ultimately Proto-Indo-European -kos, a formative element creating adjectives.
groggy (English): Slowed or weakened, as by drink, sleepiness, etc;...
Definitions
Slowed or weakened, as by drink, sleepiness, etc;...