Where does “koulukeittola” come from?

koulukeittola (Finnish) comes from Finnish keittola, from Finnish la, from Finnish lauantai, from Old Norse laugardagr, from Old Norse laug, from Proto-Germanic laugō, from Proto-Indo-European lewh₃- — to wash.

koulukeittola (Finnish): school kitchen

Definitions

school kitchen

Ancestry of “koulukeittola”, step by step

koulukeittola traces back through two separate lines of ancestry.

via Finnish keittola

Step	Language	Word	Meaning
1	Finnish	keittola	school kitchen
2	Finnish	la	Abbreviation of lauantai
3	Finnish	lauantai	Saturday
4	Old Norse	laugardagr	Saturday
5	Old Norse	laug	bath; hot spring; first-person singular past...
6	Proto-Germanic	laugō	bath, wash; soap, lye
7	Proto-Indo-European	lewh₃-	to wash

via Finnish koulu

Step	Language	Word	Meaning
1	Finnish	koulu	school
2	Latin	schola	Leisure time given to learning; schooltime,...
3	Ancient Greek	σχολή	leisure, free time; rest; that in which leisure...
4	Proto-Hellenic	skʰolā́	—
5	Proto-Indo-European	sǵʰ-h₃-léh₂	—
6	Proto-Indo-European	seǵʰ-	to hold; to overpower

Every word from Proto-Indo-European lewh₃- →Every word from Proto-Germanic laugō →Every word from Old Norse laug →