Where does “kaksikorvaisuus” come from?

kaksikorvaisuus (Finnish) comes from Finnish kaksikorvainen, from Finnish -korvainen, from Finnish -inen, from Finnish -uus, from Proto-Finnic -uc — -ness, -hood.

Ancestry of “kaksikorvaisuus”, step by step

kaksikorvaisuus traces back through two separate lines of ancestry.

via Finnish kaksikorvainen

StepLanguageWordMeaning
1Finnishkaksikorvainentwo-eared, double-eared having two ears
2Finnish-korvaineneared; forms adjectives describing the amount or qualities of ears
3Finnish-inen-like, -ous, -y; -en; Creates adjectives from...
4Finnish-uusForms nouns from adjectives, expressing a quality
5Proto-Finnic-uc-ness, -hood

via Finnish uus

StepLanguageWordMeaning
1FinnishuusAlternative form of uusi
Every word from Proto-Finnic -ucEvery word from Finnish -inenEvery word from Finnish -uus