Pass up and Sit out

Pass up verb - To show unwillingness to accept, do, engage in, or agree to.

Sit out and pass up are semantically related in give up topic. In some cases you can use "Sit out" instead a verb "Pass up", when it comes to topics like do without, hold back from doing.

Sit out verb - Endure to the end.

Pass up and sit out are semantically related in give up topic. You can use "Pass up" instead a verb "Sit out", if it concerns topics such as do without, hold back from doing.