Strong’s Greek
G4744 — stilbo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
στίλβω
stilbo — pronounced stil'-bo
apparently a primary verb; to gleam, i.e. flash intensely:--shining.
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.