soffione
noun
sof·fi·o·ne
ˌsäfēˈōnē,
ˌsōf-,
-ō(ˌ)nā
plural soffioni
-ō(ˌ)nē
: a jet of steam usually accompanied by other vapors that issues from the ground in a volcanic region
Word History
Etymology
Italian, from augmentative of soffio puff, blast, from soffiare to blow, from Latin sufflare to inflate, blow upon