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vainglorious

/ˌveɪnˈɡlɔː.ɹi.əs/ adjective

Latin root: vānus Wiktionary

Origin

From Middle English veinglorious, from Old French vain glorios, from Latin vānus (“empty”) + glōriōsus.

From Wiktionary, via Kaikki.org (CC BY-SA)