ympyrä

Etymology
as a shortening (perhaps back-formation) of the dialectal terms, , ultimately from. The -ä- in has turned into an -y- in these derivatives and thus in  as well, probably by influence from the preceding sounds (labial ymm-, ymp-). Arguably analyzable as.

Noun

 * 1)  circle
 * 2)  roundel
 * 3)  kroužek
 * 4)  orb sphere of action