Proto-MSA

*ghm - to do things in the morning (Kogan 2015:553)

See Kogan 2015:553 for etymological overview.

Mehri
gəhēm - to go (a long way); to go in the morning (ML 117)
Mehri
gēhəməh - tomorrow (ML 117)
Jibbali
gɛhɛ́m - to come in the morning (JL 73)