In a morally wicked, corrupt, or evil manner; with depravity.
From depraved (adjective) + -ly (adverbial suffix). The adjective 'depraved' comes from deprave, and the -ly ending makes it modify verbs or other adjectives.
English is efficient: you can watch how a Latin verb becomes an adjective becomes an adverb—'deprave' → 'depraved' → 'depravedly'—showing how word families branch like family trees.
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