(idiomatic) To understand a person's character, capabilities, or situation. / Used other than figuratively or idiomatically: see have, someone's, number.

(informal, idiomatic) Perfectly suitable to someone; matching someone's interests and abilities.

(informal) To be well ahead of someone, or to win a competition by a considerable margin over someone. / (informal) To comprehensively beat someone in a fight.

(idiomatic) To guess or deduce what someone is thinking.

(idiomatic) To physically traumatize someone with a strong blow, especially a concussive blow to the head. / (idiomatic) To please; to satisfy greatly.

To prove the innocence of a person previously considered or suspected to be guilty.

(Australia, colloquial, vulgar) To annoy or frustrate someone to a great degree. / (vulgar) To creep someone out; to scare someone.

(UK, Australia, informal, idiomatic) To frustrate, infuriate, irritate or disturb someone.

(informal) To do someone a favour.

(idiomatic) To keep someone uninformed and waiting for a response.