abjure, abnegate, avoid, cease, constrain, curb, decline, deny oneself, do without, eschew, evade, fast, fence-sit, forbear, forgo, give the go by, give up, go on the wagon, keep from, pass, pass up, quit, refrain, refuse, renounce, shun, sit on one's hands, sit on the fence, sit out, spurn, starve, stop, take the cure, take the pledge, withhold
from: thesaurus.com
The synonyms could include avoid, eschew, refrain (from), or go without.
Synonyms for the word abnegate: abstain, decline, forbear, forgo, give up, refrain and reject.
I think that antonym for abstain is to do it
Buddhists have five precepts or ethic requirements that they must adhere to. They must abstain from killing, abstain from taking what is not given, abstain from sexual misconduct, abstain from false speak, and abstain from drinking alcohol.
If you are refering to abstain from eating meat, the answer is "NO."
Rather than vote yea or nay, I choose to abstain.
Most athletes abstain from smoking cigarettes.
You should abstain from coming to this site to answer homework.
It is extremely difficult for me to abstain from sex.
During Lent , Practicing Catholics ABSTAIN from eating meat.
The couple agreed to abstain from having sex until they are married.
Please abstain from calling me names. To keep from doing something.