aðgerðarinnar
aðgerðarinnar is the genitive singular definite form of the Icelandic noun aðgerð, which means operation, procedure, or intervention. The form indicates possession or a close relation to the operation, and it appears in noun phrases such as “upphaf aðgerðarinnar” (the beginning of the operation) or “markmið aðgerðarinnar” (the aim of the operation). The definite genitive is formed from the base noun aðgerð, with the genitive ending -ar and the definite determiner -innar attached, yielding aðgerðarinnar.
Aðgerð is a feminine noun. Its genitive singular form is aðgerðar, and when the noun is definite,
Aðgerð derives from Old Norse and is built from the root related to making or doing, akin
Examples include: “upphaf aðgerðarinnar var tilkynnt í dag” (the beginning of the operation was announced today)