PS

*ḫrš - to be deaf and dumb (SED I No. 32ᵥ; HALOT 357)

Akkadian
ḫarāšu - binden, anbinden(?) (CAD Ḫ 95, AHw. 324)
Probably related. In CAD (meanings 3a, b) commented as: “uncertain meaning, said of parts of the human body”. However, at least two contexts clearly refer to mouth.
Ugaritic
ḫar(r)āšu - deaf (Huehnergard 1987: 130)
Alphabetically not attested.
Hebrew
ḥrš - to be deaf (HALOT 357)
Deir Alla
ḥršn (pl.) - deaf, deaf and dumb (DNWSI 409)
Official Aramaic
ḥrš - deaf (DNWSI 409)
Syriac
ḥrš - to be mute, silent (LSyr. 259, SL 495)
Mandaic
ḥrš - to be deaf(-mute) (MD 153)
Arabic
ḫrs - to be numb (BK 1 557, Lane 721)
Geez
ḥarrasa - to sleep (CDG 244)
Related with a meaning shift?