PS

*kbs - to tread (Kogan 2015: 296)

PC
*kbs - to full, to wash clothes (Kogan 2015: 296)

Akkadian
kabāsu - to step upon; to make compact; to let time pass (CAD K 5, AHw. 415)
Arabic
kbs - to fill up with earth; II. to press, squeeze (Lane 2588)
Soqotri
kébos - to fill in (LS 213; CSOL II 497)