Present participle: acting with bravado, engaging in swaggering or exaggerated displays of boldness.
Present participle of bravado used as a verb; formed with the -ing suffix added to the verb form of bravado.
Even though 'bravadoing' is grammatically possible, it remains virtually unused in written English—speakers prefer 'showing bravado' or 'acting with bravado,' showing how some words resist verbification.
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