IPA: /ˈsmoʊkləs/
KK: /ˈsmoʊkləs/
Not producing or containing smoke, often used to describe places or products that do not involve smoking or the emission of smoke.
The new grill is designed to be smokeless, making it perfect for indoor use.
Smokeless → It is formed from "smoke" (from Old English *smoca*, meaning the visible vapor or gas produced by burning) and "-less" (meaning without). The word "smokeless" means without smoke or free from smoke.
Think of being 'without' ('-less') any 'visible vapor' ('smoke') — that's what smokeless means.