Lexical Definition

‎γναφεύς‎ gnapheús (gnaf-yuce') one who bleaches G:N-M
by variation for a derivative from (to tease cloth)

fuller.

Usage: 3 forms in 4 verses
Form Translated As     In Verse(s)
κναφέωσ fuller LXX.Isa.7.3LXX.Isa.36.2
γναφεὺσ a launderer Mark.9.3
γναφέωσ fuller LXX.2Kgs.18.17

Abbott-Smith

γναφεύς, -έως, ὁ, Ion. and κοινή form of Att. κναφεύς (< κνάπτω, to card wool), [in LXX for כָּבַס, IV Ki 18:17, Is 7:3 36:2*;]
a fuller, cloth-dresser: Mk 9:3.†

Abbott-Smith References

Book Refs
2 Kings 18:17
Isaiah 7:3 · 36:2
Mark 9:3

Liddell-Scott-Jones

γναφεύς-εύς, έως, ,

fuller, cloth-carder or dresser, [Refs 6th c.BC+]; γνᾰφ-, [Refs 5th c.BC+], and usually in later Gr., [Refs 3rd c.BC+], etc.; but κναφεύς [Refs 2nd c.AD+]

__II γναφεύς, kind of fish, [Refs 1st c.BC+]