Past tense: acted with swaggering bravado, displayed false or exaggerated boldness.
Past tense of bravado, using the regular -ed ending; bravado derives from Spanish bravoada, meaning boastful behavior.
The past tense 'bravadoed' is actually quite rare in modern English—most people just say 'acted with bravado' instead, showing how some verbs naturally resist becoming verbs even when grammar technically allows it.
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