Volcanic Smoke
noun
ふんえん
火山 (かざん) Volcano
噴火 (ふんか) Eruption
噴煙 (ふんえん) Volcanic Smoke
煙 (けむり) Smoke
黒煙 (こくえん) Black Smoke
The fun ふん ended えん when people started choking on Volcanic Smoke.