abstain

verb6

1. •
   Refrain from (something or doing something); keep from doing, especially an indulgence.

   • In order to improve his health, Rob decided to abstain from smoking.
2. •
   To refrain from drinking alcohol.
3. •
   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.
4. •
   [with oneself] (no longer used) Keep or withhold oneself.
5. •
   (no longer used) Fast (not eat for a period).
6. •
   (no longer used) Hinder; keep back; withhold.

   • Whether he abstain men from marying [sic]. — 1645