In the west it is a vihta, in the east a vasta. The ethnologist Kustaa Vilkuna mapped the line in 1932, and when Yle asked 38,223 people in 2026, it had barely moved. Both words are correct.

Which one do you say? And if you are not Finnish, what would you call it?

Sources: Yle, June 2026 survey of 38,223 respondents; Kustaa Vilkuna's 1932 map.