μεγαλαυχέω G3166
megalauchéō · meg-al-ow-kheh'-o · Verb
from a compound of μέγας and (to boast; akin to αὐξάνω and καυχάομαι); to talk big, i.e. be grandiloquent (arrogant, egotistic):--boast great things.
1 Occurrence in the King James Bible
James 3:5Even so the tongue is a little member, and boasteth great things. Behold, how great a matter a little fire kindleth!