also: くろけむり
black smoke
Refers to dark, often thick smoke, typically from fires, engines, or industrial sources.
Black smoke is rising from the factory.
Black smoke was coming out of the car's exhaust pipe.
Black smoke is rising from the factory.
The old truck was running while giving off black smoke.
The building was quickly engulfed in black smoke.
黒煙 is dark, sooty smoke while 白煙 is white smoke, often from steam or clean combustion.
Standard kanji spelling; the most common written form.
Kana spelling reflecting the colloquial reading くろけむり; used in informal or spoken contexts.
Compound of 黒 (black) and 煙 (smoke). The reading こくえん is the standard on'yomi, while くろけむり is a mixed kun'yomi reading used colloquially.