勇敢 (yǒng gǎn) is the general adjective for 'brave, courageous' — it describes a person's character or action in facing danger or difficulty. It is broader than 大胆 (dà dǎn 'bold, daring'), which emphasizes taking risks without fear, and less intense than 英勇 (yīng yǒng 'heroic'), which is used for acts of exceptional bravery, often in war or crisis.