From Wiktionary, the free dictionary
From Proto-Finnic *-dak. Cognates include Finnish -da.
-vva (front vowel variant -vvä)
- First infinitive marker.
- saa- + -vva → saavva
- käy- + -vva → käyvvä
- Used after monosyllabic stems ending in -a, -o, -ö, -u, -y.