Akkadian

umṣatu - a mole or wart (CAD U–W 135, AHw. 1418)

Compared by von Soden to Jud. ˁumḳā ‘dark (inflamed) spot, rising, swelling’ [Jastrow 1090]. This comparison implies a protoform *ˁ/γumṣ̂ which is less likely since the development PS *ṣ̂ > ḳ in Jud. and other late Arm. dialects is quite exceptional.

PS
*ḥumṣ-at- - birth-mark, scar on the skin (SED I No. 121; Kogan 2011: 230)
Questionable; attested in Akk. and Arb. only. The Arb. form may be synchronically analyzed as derived from ḥmṣ (II) ‘torréfeer, griller, rôtir’ [Dozy I 322], but historically a direct connection with Akk. umṣatu seems preferable (consider an almost complete identity of the vocalic shape as well as the fact that the Arb. verbal root is attested only in the second stem, which is widely used to produce denominative verbs)