煙
けむり · kemuri · JLPT N3 · noun
smoke
🔥💨 煙 = 火 fire + 垔; kemuri sounds like came murky, as air does with smoke
The fire radical 火 on the left tells you this is something fire produces. Kemuri sounds like came murky: when smoke comes, the air goes murky. In compounds it is read えん, as in 禁煙 (kin'en, no smoking).