ḫidr- - a chamber that conceals a person
(Lane 708)
PWS
*ḥadr-/*ḫadr- - inner room, living quarters
(Kogan 2015: 82)
*ḫ in Arabic, ESA, EthS and MSA vs. *ḥ in Ugaritic and Ebla. Perhaps also Soq. ḥdr ‘s’arrêter’ (LS 165), attested in Müller 1905:287 (ḥedaíroh ‘sie ließ
sich nieder’)