Strong's Concordance G3166

Original Word: μεγαλαυχέω
Transliteration: megalauchéō
Phonetic Spelling: meg-al-ow-kheh'-o
[μεγαλαυχέω] from a compound of G3173 and αὐχέω (to boast; akin to G837 and G2744); to talk big, i.e. be grandiloquent (arrogant, egotistic)

Usages throughout the bible

James 3:5 - Even so the tongue is a little member, and boasteth great things. G3166 Behold, how great a matter a little fire kindleth!