Dict: strongs - vainly
Strongs:
G2755 @ κενόδοξος kenodoxos ken-od'-ox-os From G2756 and G1391; vainly glorifying that is self conceited: - desirous of vain-glory.
G2761 @ κενῶς kenōs ken-oce' Adverb from G2756; vainly that is to no purpose: - in vain.