Where does “vuoteenkastelu” come from?

vuoteenkastelu (Finnish) comes from Finnish vuode, from Finnish vuota, from Proto-Finnic voota, from Proto-Finnic vootadak, from Proto-Finnic voo, from Proto-Uralic uwa- — to flow.

Ancestry of “vuoteenkastelu”, step by step

vuoteenkastelu traces back through two separate lines of ancestry.

via Finnish vuode

StepLanguageWordMeaning
1Finnishvuodebed
2Finnishvuotahide, pelt; Partitive singular form of vuo
3Proto-Finnicvootahide, pelt
4Proto-Finnicvootadakto flow; to trickle, to seep; to leak
5Proto-Finnicvooflow
6Proto-Uralicuwa-to flow

via Finnish kastelu

StepLanguageWordMeaning
1Finnishkasteluirrigation; watering; wetting
2Finnish-uForms nouns from verbs. Most common with "e"- and...
3Proto-Finnic-uForms nouns from adjectives, nouns
Every word from Proto-Uralic uwa- →Every word from Proto-Finnic voo →Every word from Proto-Finnic vootadak →