Where does “kosintaretki” come from?

kosintaretki (Finnish) comes from Finnish kosinta, from Finnish -ntä, from Proto-Finnic -nta — Forms action nouns from verbs.

Ancestry of “kosintaretki”, step by step

kosintaretki traces back through two separate lines of ancestry.

via Finnish kosinta

StepLanguageWordMeaning
1Finnishkosintaproposal of marriage
2Finnish-ntäFront vowel variant of -nta; API
3Proto-Finnic-ntaForms action nouns from verbs

via Finnish retki

StepLanguageWordMeaning
1Finnishretkitrip; expedition
Every word from Proto-Finnic -nta →Every word from Finnish -ntä →Every word from Finnish kosinta →