PCS

*kāhin- - priest, wizard (Kogan 2015: 213)

In MSA, note Mhr. káthən ‘to pretend to something in order to attain one’s object,’ kōhən ‘cunning’ and Jib. kɔ́thən ‘to be cunning, to pretend to get what one wants’, perhaps autochthonous as no corresponding meanings seem to be attested in (Classical) Arabic. (Kogan 2015: 213)

Ugaritic
khn - priest (DUL 433)
Hebrew
kōhēn - priest (HALOT 461)
Syriac
kāhnā - priest (LSyr. 319, SL 601)
Arabic
kāhin- - seer, soothsayer, magician, wizard, priest (WKAS K 417)
Geez
kāhən - priest, clergyman (CDG 278)
the word is likely borrowed from Aramaic