Where does “keilakilpailu” come from?

keilakilpailu (Finnish) comes from Finnish kilpailu, from Finnish -u, from Proto-Finnic -u — Forms nouns from adjectives, nouns.

Ancestry of “keilakilpailu”, step by step

keilakilpailu traces back through two separate lines of ancestry.

via Finnish kilpailu

StepLanguageWordMeaning
1Finnishkilpailucontest, competition, race; competition; rivalry
2Finnish-uForms nouns from verbs. Most common with "e"- and...
3Proto-Finnic-uForms nouns from adjectives, nouns

via Finnish keila

StepLanguageWordMeaning
1Finnishkeilapin, tenpin; beam; cusk, Brosme brosme
2Icelandickeilacone; bowling pin, tenpin; torsk, cusk
Every word from Proto-Finnic -uEvery word from Finnish -uEvery word from Finnish kilpailu