Where does “kotoutua” come from?

kotoutua (Finnish) comes from Finnish -utua, from Finnish -ua, from Proto-Finnic -üdäk — Forms mainly passive or anticausative verbs.

kotoutua (Finnish): to integrate, acclimatize, settle, resettle, assimilate of migrants, to settle in adapt to the culture, language and ways of the host country, without losing the basic features of the culture of origin; of animals in a new habitat