In a manner without shame or embarrassment; without showing any sign of being ashamed or self-conscious.
From 'abash' (to embarrass or shame, from Old French 'abassir') + '-less' (without) + '-ly' (manner). The prefix 'a-' intensifies the effect, creating a word meaning the complete absence of shame.
This is a delightfully rare adverb that captures a specific kind of boldness—the confidence of someone who's completely immune to embarrassment. It's the kind of word you'd use to describe someone telling an outrageous joke at a formal dinner without flinching.
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