küsimusest

küsimusest is the elative singular form of the Estonian noun küsimus, meaning "question". Formed by adding the suffix -st to the nominative base, it typically translates as "from the question" or, in common usage, "about the question" when used after verbs of speaking, thinking or writing.

Morphology and pronunciation: küsimus (nominative) → küsimusest (elative singular). Pronounced approximately [ˈkʏsimusest] in Estonian, with primary stress on the first syllable and the front rounded vowel ü. The corresponding plural elative is küsimustest.

Syntactic functions: the elative case indicates origin, source or separation and is often employed to mark the topic of discussion or the source of information. Examples: "Rääkisime küsimusest" ("We talked about the question") and "Küsimusest lähtudes" ("Starting from the question"). It contrasts with related cases such as the partitive (küsimust), genitive (küsimuse) and inessive (küsimuses).

Etymology and cognates: küsimus derives from the verb küsima ("to ask") and belongs to the Finno-Ugric lexical layer. Cognates appear in related languages, for example Finnish kysymys. Usage of küsimusest follows regular Estonian case patterns and is a common element in both spoken and written language whenever the sense "from/about the question" is required.