PWS

*dVmm(ān)- - cloud (Militarev 2004: 299–300, 2010: 58; Kogan 2015: 448)

The EthS terms can be alternatively considered to be borrowed from Cushitic.

Syriac
dimtā d-ṭallā - thin cloud like ashes (LSyr. 151, SL 296)
Arabic
damm-, dimām- - clouds in which is no water (Lane 910)
Arabic
dīmat- - a lasting and still rain (Lane 937)