In a decadent manner; with excessive luxury, moral decline, or artistic concern with beauty and decay.
From 'decadent' + '-ly' (adverbial suffix). This adverb form takes the adjective 'decadent' and adds the standard English adverbial ending to describe how something is done in a decadent way.
When someone eats dessert 'decadently,' they're not just eating—they're indulging deliberately and enjoying every excess moment of it, which is exactly what the word implies about culture and behavior.
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