Pawl and Pen up

Pawl noun - A hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward.

Pen up and pawl are semantically related. In some cases you can replace term "Pen up" with "Pawl", this nouns are similar.

Pen up verb - Confine in a fold, like sheep.

Pawl and pen up are semantically related. You can use "Pawl" instead a verb "Pen up".