to spout out; to spurt out; to gush out; to jet out
to sprout; to bud
to burst into laughter
to blow (smoke, etc.)
to send out shoots (of a tree)
彼の話に思わず吹き出した。
I couldn't help bursting out laughing at his story.
パイプから水が吹き出している。
Water is gushing out from the pipe.
彼の冗談に思わず吹き出す。
I couldn't help but burst out laughing at his joke.