The origin of Proto-MSA *ḫűr-, *ḫarr-Vn- ‘a little’ is uncertain, although A. Jahn’s comparison (1902:199) with Arb.
ḫwr ‘to be weak, feeble’ is not unreasonable, see further Gez.
ḫəwwur ‘weak, invalid’, Tgr.
ḥawärä ‘perdre la parole (de faiblesse)’, compared to Mhr. ḫawr in CDG 269. Semantically more attractive is M. Bittner’s equation (1915a:40-41) with Arb. ḥwr ‘to decrease, to be defective or deficient’ (Lane 665), but one is reluctant to accept it because of the phonological difference (Kogan 2015:559)