lahendina

Lahendina is an Estonian word used to express the idea "as a solution" or "in the role of a solution." It is formed by attaching the essive case ending -na to a root related to lahendus (solution) and indicates a temporary state, function or role. In English contexts it is most commonly rendered as "as a solution," "as a remedy" or "in the form of a solution."

Usage of lahendina appears in technical, scientific and everyday language. In chemistry it can denote a substance used in liquid solution (for example, "see aine kasutati lahendina" — "this substance was used as a solution"), while in problem-solving contexts it describes an approach or method serving as a solution to a problem. Grammatically, the essive case in Estonian marks a state or capacity and is one of several locative/qualitative cases used instead of prepositions.

Etymologically the term relates to the verb lahendama ("to solve") and the noun lahendus ("solution"), reflecting Estonian’s agglutinative morphology. Comparable constructions occur throughout Finno-Ugric languages that use case endings to express roles and states. The word is primarily functional and descriptive rather than a lexical item with specialized technical senses. See also: lahendus, lahendama, essive case.