to have the necessary courage or boldness for something; be bold enough

You wouldn't dare!

to have the boldness to try; venture; hazard.

to meet defiantly; face courageously.

to challenge or provoke (a person) into a demonstration of courage; defy

to dare a man to fight.

to have the necessary courage or boldness to (used chiefly in questions and negatives)

How dare you speak to me like that? He dare not mention the subject again.

an act of daring or defiance; challenge. ?

dare say

daresay.