PES

*zVnām - rain (Kogan 2015: 442–443)

original shape of the root is probably preserved in Akk , PES together with Sab ḏnm – must be due to dissimilation. Different directions of dissimilation in modern EthS (n >l, m > b) are phonetically unproblematic (Kogan 2015: 442-443)

Geez
zənām - rain (CDG 641)
Geez
zanma, zənām - rain (CDG 641)
Tigre
zəlam - rain (WTS 494)
Tigrinya
zənam, zənab - rain (TED 1995, 1996)
Amharic
zənab - rain (AED 1649)
Harari
zənāb - rain (EDH 166)
Soddo
zənab - rain (EDG 710)