abstain from
To refrain from consuming something or doing some activity. Katie wants to lose weight, so she has vowed to abstain from sugar.
abstain from something
to avoid some activity or the use of some substance, such as alcohol, drugs, sex, or food. They abstained from hard liquor and any other kind of intoxicants.
abstain from
v. To have made a deliberate choice not to do something: I abstained from eating fatty foods when I was on my diet. The minister abstained from drinking alcohol.