IPA: //ˈveɪnˌɡlɔːri//
KK: /ˈveɪnˌɡlɔri/
An excessive pride in oneself or one's achievements, often shown in a way that seeks attention or admiration from others.
His vainglory made it difficult for him to accept constructive criticism.
Vainglory is formed from "vain" (from Old French *vain*, meaning empty or worthless) and "glory" (from Latin *gloria*, meaning fame or renown). The word describes a sense of pride in one's own achievements that is ultimately empty or without substance.
Think of 'vain' meaning empty and 'glory' meaning fame — this helps you remember that vainglory refers to an empty pride in one's achievements.