piercing

Able or seeming to pierce, as.

Very loud; shrill.

Fixed and intense in appearance.

Causing pain, especially because of cold.

Trenchant; incisive.

Keenly perceptive or intelligent.

A piece of jewelry designed to be worn through a perforation in a body part.

The hole through which such a piece of jewelry is worn.

Penetration. Specifically

In metalworking, the operation of sawing out a pattern or an object from a plate, as distinguished from punching it out. It is done with a jigor band-saw.