(idiomatic) To rapidly reach a turning point or climax. / (idiomatic) To suddenly reveal that which has lain latent for a time.

(in the negative) To fail to make head or tail of; not to understand at all.

A surname from Middle English, from residence near a hilltop or the head of a river, or a byname for someone with an odd-looking head.

In a very close one-on-one situation.

(idiomatic) A compensation for capturing or killing a person, especially someone guilty of a crime.

(figuratively, usually with have or with) Used to indicate that a person is distracted or disconnected from the present situation.

(idiomatic, chiefly Scotland, Ireland, Liverpudlian, slang) a stupid person; a nutcase

A screwdriver whose handle and hexagonal head are at right angles.

A screw with a hexagonal head.

A bolt with a hexagonal head.