vainglorious adj. + Add to list UK //veɪŋɡlˈɔːɹɪəs// vain·glo·ri·ous SynonymsEtymology Synonyms bigswelledOriginLATvānus→OFRvain glorios→MEveinglorious→ENvainglorious From Middle English veinglorious, from Old French vain glorios, from Latin vānus (“empty”) + glōriōsus.