Abstinent (adjective)

1. Choosing to refrain from something, especially alcohol or sexual activity.
2. Marked by self-restraint and self-control.

Origin:

From latin abstinentem, from abstinere "to hold back, abstain from".

Examples:

1. He is abstinent from alcohol and drugs.
2. The group is abstinent from smoking, drinking and drugs.
3. She has been abstinent from sexual activity for several months.
4. The doctor recommended an abstinent lifestyle to improve his health.
5. He is an abstinent person and does not indulge in any vices.