1 á-kafi
a, m. [ákafr], eagerness, vehemence; þá görðist svá mikill á. á, at …, it went to such an excess, that…, Nj. 62, Fms. i. 35, xi. 389; með á. miklum, vehemently, Eg. 457; í ákafa, adverbially, eagerly, impetuously, Nj. 70, Fms. xi. 117.
2 á-kafi
2. the gen. ákafa is prefixed,
3 á-kafi
α. to a great many adjectives, in the sense of a high degree, very, e. g. á. reiðr, furious, Fms. vii. 32, x. 173; á. fjölmennr, very numerous, Ísl. ii. 171; á. fögr, beautiful (of Helena), Ver. 25.
4 á-kafi
β. to some substantives; á. Drífa, a heavy snow drift, Sturl. iii. 20; á. maðr, an eager, hot, pushing man, Eg. 3, Fms. i. 19, vii. 257, Grett. 100 A: in this case the ákafa may nearly be regarded as an indecl. adjective.