fumarole
An opening in the ground that emits steam and gases due to volcanic activity.
Masaya did not offer an opportunity to sample high-temperature fumaroles, but its neighbors, Momotombo and Cerro Negro volcanoes, are noted for their fumarolic activity
Where it comes from
Borrowed from Italian fumarola. Likely a doublet of femerell. By surface analysis, fume + -ar + -ola.
Adapted from the Wiktionary entry fumarole (CC BY-SA 4.0).