Mehri

kəḥēb - to come in the middle of the day (ML 226)

The verb widely attested in SAE IX and SAE III, Mundart B “to the detriment of nkˁ, which, nevertheless, apparently preserves its basic status in all Mehri corpora” (Kogan 2015:494)

Proto-MSA
*ḳhb - to be in daytime (Kogan 2015:561)
The origin is unknown.