Areal reconstruction

*γml - to be(come) mouldy (Kogan 2005c:189)

Geez
ˁammala - to become moldy, be covered with mildew (CDG 63)
Tigrinya
ˁammälä - to become discolored, to turn black, become black (teeth); to get mouldy (bread) (TED 1831)
Amharic
ammälä - to be spoiled (grain by dampness) (AED 1119)