Abstain

Verb

1. Keep or withhold oneself. .mw-parser-output .defdate{font-size:smaller}
2. Refrain from (something or doing something); keep from doing, especially an indulgence.

   "In order to improve his health, Rob decided to abstain from smoking."

3. To refrain from drinking alcohol.
4. Fast (not eat for a period).
5. Deliberately refrain from casting one's vote at a meeting where one is present.

   "I abstain from this vote, as I have no particular preference."