Tasoihin

Tasoihin is a Finnish grammatical form that functions as the illative plural of the noun taso, meaning level or surface. In Finnish, the illative case expresses direction toward or into something, and the plural illative is formed with the suffix -iin, producing tasoihin. Thus tasoihin roughly corresponds to “into the levels” or “to the levels” in English, depending on the sentence.

The base word taso denotes a level, tier, plane, or surface, and tasoihin appears in contexts discussing movement toward or entry into multiple levels. The form is most often found in technical, architectural, planning, or organizational texts where several levels, floors, stages, or tiers are being described. It is less common in everyday casual speech and more typical in formal or descriptive writing.

Related grammatical forms of taso include tasoon (illative singular), tasot (nominative plural), tasoja (partitive plural), tason (genitive singular), and tasojen (genitive plural). These forms follow standard Finnish noun-declension patterns and enable precise expression of number and case across different contexts.

Etymology traces tasoihin to the root taso, with the illative plural suffix -iin added. The construction mirrors common Finnish patterns for indicating direction into multiple items or levels. As a grammatical form, tasoihin carries no separate lexical meaning beyond that indicated by taso and the illative plural ending; its interpretation depends on how it is used within a sentence.