aboveproof
adj. C2 Proficiency above·proof
adj. not affected by alcohol or drugs. It describes someone who is so strong or sober that they cannot be influenced by these things.
adj. immune to the effects of alcohol or drugs; possessing a level of sobriety or strength that prevents influence.
He is aboveproof and never gets drunk.
The leader is aboveproof, maintaining a clear mind even after the most intense political debates.
In a world where many are susceptible to the persuasive power of intoxicants, she remains aboveproof, guided solely by her internal moral compass.