Where does “purskaus” come from?

purskaus (Finnish) comes from Finnish purskahtaa, from Finnish -ähtää, from Proto-Finnic -ahtadak, from Proto-Uralic -ašta-.

Ancestry of “purskaus”, step by step

StepLanguageWordMeaning
1FinnishpurskahtaaTo gush, spurt; ~ nauruun = to burst out...
2Finnish-ähtääFront vowel variant of -ahtaa
3Proto-Finnic-ahtadakForms momentane verbs
4Proto-Uralic-ašta-
Every word from Proto-Uralic -ašta-Every word from Finnish -ähtääEvery word from Finnish purskahtaa