Hebrew and Greek Strong's Dictionary with all the definitions plus combined with every place that word is used in the definitions.
Complete index of every word used in both the Hebrew and Greek Strong's Dictionary in English Word order.
Hebrew and Greek Expanded Dictionary
vainly 2755 - kenodoxos {ken-od'-ox-os}; from 2756 and 1391; {vainly} glorifying, i.e. self-conceited: -- desirous of vain-glory.
vainly 2761 - kenos {ken-oce'}; adverb from 2756; {vainly}, i.e. to no purpose: -- in vain.