In a manner showing shame, degradation, or having been humiliated; in a way that suggests low status or dishonored condition.
From 'abased' (adjective) + '-ly' (adverbial suffix), creating an adverb describing how an action is performed with shame or humiliation.
English lets us add '-ly' to almost any adjective to create adverbs—abasedly shows how flexibly we can describe manner and attitude, even emotional states!
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