Spewing
Gushing, Spouting, Eruption
noun, verbal noun
When something erupts out an exit it usually had to fight pretty hard to get to that exit. That's why it ends up spewing and gushing all over the place.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
ブラックホールからガスが噴出しているって本当ですか？
Is it true that gas spews out of black holes?