'Yǒng yú' is an adverbial phrase meaning 'brave enough to' or 'courageous in doing something.' It combines 勇 (yǒng), meaning 'bravery' or 'courage,' and 于 (yú), a classical preposition that introduces the action or domain where courage is demonstrated. Though 于 is rarely used alone in modern spoken Chinese, it appears idiomatically in set phrases like this one, always followed by a verb (e.g., 勇于承认, 勇于尝试). The structure signals moral or psychological readiness—not physical bravery—and is commonly used in formal speech, education, and self-improvement contexts.

This phrase carries a positive, aspirational tone and often appears in motivational language, leadership discourse, or personal reflection. It implies not just willingness but principled resolve: the speaker or subject acts despite fear, shame, or difficulty. Unlike standalone adjectives like 勇敢 (yǒnggǎn), 勇于 must attach directly to a verb and cannot modify nouns. Its usage reflects Confucian-influenced values emphasizing moral courage and proactive integrity.