Perusteina

Perusteina is a Finnish term derived from peruste (basis, foundation) and used to indicate that something is being considered or presented as a basis for a claim, decision, or interpretation. The form often conveys that multiple bases are involved or that what is being referred to functions as the foundation for what follows. In written Finnish, per use appears in sentences that aim to justify or ground an assertion, such as: "Perusteina käytettiin sekä aikaisempia tutkimuksia että tilastoja," meaning that previous studies and statistics served as the bases for the argument.

Usage and context: Perusteina is most common in formal, academic, and legal discourse, where it helps to structure justification and evidence. It can introduce what material or reasoning underpins a conclusion. The expression is typically paired with verbs like toimia (to act as), olla (to be), or perustella (to justify), depending on the grammatical construction of the sentence.

Etymology and grammar: The word is formed from peruste with the suffix -ina, which marks a plural or collective sense of bases in this usage. It is commonly found in predicative or attributive positions, often indicating the grounds for a statement, decision, or interpretation.

See also: peruste, perusta, perusteellinen. English equivalents include basis, foundation, and grounds. Perusteina provides a concise way to reference the evidentiary or foundational elements underpinning a claim in Finnish prose.