ματαιόω (mataióō|mat-ah-yo'-o|verb|to render futile)
[Grk] ματαιόω, ματαιόομαι LN: 65.38 GK: G3468, G3471 Hebrew: אָוֶן‎, בָּעַר‎, הָבַל‎, הֶבֶל‎, חִנָּם‎, שָׁוְא‎, שָׁוְא‎, שָׂכַל‎, שֶׁקֶר‎
Derivation: from μάταιος;
Strong's: to render (passively, become) foolish, i.e. (morally) wicked or (specially), idolatrous
KJV: --become vain.
See: μάταιος