If you do not dare to do something, you do not have enough courage to do it, or you do not want to do it because you fear the consequences. If you dare to do something, you do something which requires a lot of courage.

If you dare someone to do something, you challenge them to prove that they are not frightened of doing it.

A dare is a challenge which one person gives to another to do something dangerous or frightening.

If you say to someone 'don't you dare' do something, you are telling them not to do it and letting them know that you are angry.

You say 'how dare you'' when you are very shocked and angry about something that someone has done.

You use 'dare I say it' when you know that what you are going to say will disappoint or annoy someone.

You can use 'I dare say' or 'I daresay' before or after a statement to indicate that you believe it is probably true.