abstinent
1. [ adjective ] self-restraining; not indulging an appetite especially for food or drink
Synonyms: abstentious
Examples:

"not totally abstinent but abstemious"

Related terms: abstemious
2. [ noun ] a person who refrains from drinking intoxicating beverages
Synonyms: nondrinker abstainer
Related terms: drinker person drinker teetotaler
Similar spelling:   abstinence
  abstain
  abstainer
  Abston
  abstention
  abstentious