óákveðnu

Ákveðnu is an inflected form of the Icelandic adjective ákveðinn, which means “definite” or “determined.” In Icelandic grammar, adjectives are declined for gender, number, and case and take a definite form when modifying a definite noun or occurring with a definite determiner. Ákveðnu appears as part of the definite inflection of the adjective in certain cases.

The form reflects how Icelandic adjectives interact with the definite suffix system. When a noun phrase is made definite—either by a definite article-like construction or by a possessive determiner—the accompanying adjective changes to a definite ending. Ákveðnu is one such definite form and is encountered in contexts where the adjective is closely aligned with the proper case and definiteness requirements of the noun it describes.

Etymologically, ákveðinn derives from the verb ákveða “to determine” and carries the sense of something that is determined or fixed. The definite form ákveðnu then signals that fixation or definiteness in the noun phrase, consistent with Icelandic grammar’s broader system of adjective endings.

See also: Icelandic grammar, definite adjective endings, ákveðinn, Icelandic orthography.