atburðar
Atburðar is the genitive singular form of the Icelandic noun atburður, which means "event" or "occurrence." In ordinary usage, atburður is the nominative form, while atburðar appears in contexts that require a genitive construction to show possession or association.
In practice, atburðar occurs most often in compounds and phrases that describe relationships involving an event.
Etymology and history: atburður derives from Old Norse atburðr, and the genitive singular form atburðar reflects