PS

*ḳdḥ - to have inflammation (SED I No. 35v)

Must be eventually derived from PS *ḳdḥ ‘to light up fire’.

Akkadian
ḳidḫu - Entzündung (CAD 251, AHw. 921)
Var. ḳudḫu.
mng. uncert. in CAD
Hebrew
ḳaddaḥat - inflammation, fever (HALOT 1067)
Jewish Palestinian Aramaic
ḳdḥy, det. ḳdḥyth - fever (DJPA 474)
Syriac
ḳdihtā - live coal (LSyr. 645, SL 1315)
Mandaic
ḳda - to inflame (MD 405)
Mandaic
ḳudha - sore, inflammation (MD 406)
Mandaic
ḳhd - to inflame (MD 405)
Related with metathesis.
Arabic
qdḥ - II. s’enfoncer dans l’orbite (se dit de l’oeil); amaigrir exprès (son cheval) (to sink into the orbit (said of the eye); to lose weight on purpose (of horse) (BK 2 684, Lane 2492)
Related with a peculiar meaning shift.
Geez
ḳadḥa - to be sick, perspire, have diarrhea (CDG 420)
Amharic
ḳädda - to have copious diarrhea (AED 817)
Also ‘to pour a liquid’.
Selti
ḳōže - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).
Wolane
ḳože - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).
Zway
ḳuǯi - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).
Chaha
ḳʷäžä - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).
Ezha
ḳʷäžžä - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).
Muher
ḳʷäžžä - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).
Masqan
ḳʷäžžä - to have dysentery, rust (EDG 514)
Either related to the present root or goes back to *ḳzy (v. EDG 514).