In a braggish manner; somewhat like bragging or with a hint of boastfulness.
Formed from the adjective 'braggish' (brag + -ish) plus the adverbial suffix '-ly.' This represents a two-step morphological process: first '-ish' softens the meaning to 'somewhat,' then '-ly' converts the adjective to an adverb describing manner. The result is an adverb expressing mild boastfulness.
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