In a gaudy, showy, or vulgarly bright manner; with excessive or tasteless ornamentation.
From 'gaudy' (adjective, meaning excessively bright or ornate) + '-ly' (adverbial suffix). 'Gaudy' comes from uncertain origins, possibly from Old English 'gaud' meaning a showy ornament, though some trace it to Latin 'gaudium' (joy).
The word 'gauily' reveals something funny about fashion history—what Victorians considered tastefully gauily ornate (covered in feathers, jewels, and bright colors) would look absurdly overdone today, yet we probably have our own 'gaudiness' we can't see.
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