Vocabulary What does 硝煙 (しょうえん, shouen) mean? 硝煙 (しょうえん, shouen) means gunpowder smoke. Quick factsReadingしょうえんRomajishouenPart of speechnoun 硝煙しょうえんshouengunpowder smoke1noun gunpowder smokeKanji in this word硝saltpeter, nitrate煙smoke