perustuvin

Perustuvin is a Finnish linguistic term referring to a present active participle form derived from the verb perustua, meaning to be based or to be founded. As an adjective, perustuva describes something that rests on a particular basis, foundation, or premise. The form perustuvin is used in inflected, attributive positions to agree with the noun it modifies, and it commonly appears in formal or literary contexts to express the basis or origin of a statement, method, or principle.

In practice, perustuvin is often found in phrases that indicate the basis of a claim or framework. For example, it can be used in constructions that mean “based on” or “according to the founding principles,” typically in combination with a noun in a suitable case such as genitive. This makes it useful for articulating authorities, grounds for decisions, or the philosophical or methodological underpinnings of an argument.

Etymologically, perustuvin comes from the verb perustua combined with the participial suffix -vin, forming a recognizable participial adjective. The form is more common in written language and in contexts where a precise description of the basis or foundation is important, rather than in everyday speech.

Related forms include the base adjective perustuva, from which various inflected forms are derived to fit different grammatical contexts. While perustuen is a common stand-alone adverb meaning “based on,” perustuvin illustrates a more specific attributive use tied to a particular basis or premise.