Where does “tasapituus” come from?

tasapituus (Finnish) comes from Finnish tasa, from Proto-Finnic tasa, from Proto-Uralic taśa — even.

Ancestry of “tasapituus”, step by step

tasapituus traces back through two separate lines of ancestry.

via Finnish tasa

StepLanguageWordMeaning
1Finnishtasaof equal height; of the same level
2Proto-Finnictasaeven
3Proto-Uralictaśaeven

via Finnish pituus

StepLanguageWordMeaning
1Finnishpituuslength; longitude; height
2Proto-Finnicpiduclength
Every word from Proto-Uralic taśa →Every word from Proto-Finnic tasa →Every word from Finnish tasa →