Mehri

gēḥi - flat desert, desert plain (ML 118)

Proto-MSA
*gāḥiy- - plain, valley (Kogan 2015: 554)
The origin is unknown. Of some interest may be Tna. guḥo ‘cave, crevice or hollow in a mountainside’. For ǯaḥi ‘soľ in Dathina v. GD 266 (due to MSA influence?)