To Burst Out
To Spout Out
intransitive verb, godan verb
"To Remove" an eruption it needs to burst out of the earth or volcano it's in.
ふきだす
Remember how you learned the word 吹き出す? Well this is read the exact same way and means almost the exact same thing. If you know one reading, you know both!
今までためていた怒りが一気に噴き出した。
The anger that had built up burst out at once.