Strong’s Greek
G1102 — gnapheus
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
γναφεύς
gnapheus — pronounced gnaf-yuce'
by variation for a derivative from knapto (to tease cloth); a cloth-dresser:--fuller.
1 occurrence in the KJV.
Mark 9:3
And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them.