Uravaihtoa
Uravaihtoa is a hypothetical historical-linguistic concept described in discussions of language contact and lexical replacement. The term, formed from Finnish ur- meaning ancient and vaihto meaning exchange, is used to describe a scenario in which substantial portions of a proto-language’s core lexicon are replaced over time by cognates borrowed from a neighboring language, producing a mixed lexicon with external origins.
In this view, the replacement is deeper than ordinary borrowing because the new forms are proposed to
Etymology and usage: The neologism is used mainly in Finnish-language discussions and in works concerned with
Identification and assessment: Analysts would compare known cognates across related languages, estimate replacement rates, and evaluate
See also: language contact, lexical borrowing, substrate and superstrate influence, lexical replacement, historical linguistics.
References: The concept of uravaihtoa remains tentative and is not a standard category in the major handbooks