IPA: /ˌæntiˈsmoʊk/
KK: /æntiˈsmoʊk/
Opposing or preventing the presence of smoke.
The antismoke policy in the building aims to keep the air clean and healthy.
Antismoke is formed from "anti-" (meaning against) and "smoke" (from Old English "smoca", meaning vapor or smoke). The word refers to being against smoke, particularly in the context of health or environmental concerns.
Think of being 'against' ('anti-') smoke, which helps you remember that 'antismoke' means opposing smoke.