PWS

*zγl - to pour out, to counterfeit (Kogan 2005c:209)

Arabic
zaγal- - adultered or counterfeit coin (Lane 1235)

Cf. Akk. zaḫālû 'a silver alloy’ (Kogan 2001:273).

Geez
zaḥala - be corrupted, be adulterated (LLA 1038)
Geez
zəḥla - corrode, rust (LLA 1038)
Tigre
zäḥal - dirt, rust (WTS 494)