Strong's #3526: kabac (pronounced kaw-bas')
a primitive root; to trample; hence, to wash (properly, by stamping with the feet), whether literal (including the fulling process) or figurative:--fuller, wash(-ing).
Brown-Driver-Briggs Hebrew Lexicon:
ּ
kâbas
1) to wash (by treading), be washed, perform the work of a fuller
1a) (Qal) washer, fuller, treader (participle)
1b) (Piel) to wash (garments, person)
1c) (Pual) to be washed
1d) (Hothpael) to be washed out
Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 51 times:
Malachi 3:2: "he is like a refiner's fire, and like fullers' soap:"