Abstain :

Hoard
Tolerate
Forbear
Begin

The answer is C. Forbear.

To forbear is to refrain from doing something, especially something that is difficult or unpleasant. It can also mean to delay or postpone something.

Hoard means to collect or store something in a large quantity, especially in a secret or hidden place.

Tolerate means to accept or allow something that you do not like or agree with.

Begin means to start something.

In the context of the question, the correct answer is C. Forbear. This is because to abstain from something means to refrain from doing it, and to forbear is a synonym for refrain. The other options are incorrect because they do not mean the same thing as abstain.