Syriac

ḥemtā - heat, ardor; poison (LSyr. 242, SL 469)

PS
*ḥim-at- - venom, bile (SED I No. 120)
Cf. Sem. *ḥi/am-at- ‘anger, rage’, *ḥmy ‘to be angry’ presumably derived from this root (otherwise from Sem. *ḥmm, *ḥmy ‘to be hot’)