Abstain :

A. Hoard

B. Tolerate

C. Forbear

D. Begin

Answer: Option D

Solution(By Examveda Team)

Hoard : a stock or store of money or valued objects, typically one that is secret or carefully guarded.
Tolerate : bear, forbear, forebear, abide.
Forbear : bear, forbear, forebear, abide.
Begin : commence, induct.
Abstain : restrain oneself from doing or enjoying something.

Antonym of Abstain is Begin.