PC

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

PS
*kbs - to tread (Kogan 2015: 296)

Ugaritic
kbs, kbs̀ - fuller, launderer (DUL 429)
Phoenician
kbs - fuller (DNWSI 486, Krahmalkov 2000: 223)
Hebrew
kbs - (pi.) to full, to clean (HALOT 459)
Hebrew
kōbēs - fuller (HALOT 459)