A person who opposes tobacco use or actively campaigns against tobacco and its use.
From anti- (against) + tobacconist (a person who sells tobacco) + -ist (one who practices or advocates). The prefix reverses the meaning to describe an opponent of the tobacconist's trade.
An antitobacconist is basically the opposite of a tobacconist—a fighter against the very product that tobacconists built their livelihoods on, showing how language captures social conflict and changing values around health!
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