Akkadian

ḳidḫu - Entzündung (CAD 251, AHw. 921)

Var. ḳudḫu.
mng. uncert. in CAD

PS
*ḳdḥ - to have inflammation (SED I No. 35v)
Must be eventually derived from PS *ḳdḥ ‘to light up fire’.