Geár-dagum

According to the Old English Dictionary:

geár-dagum

adv. [dat. pl. of geárdæg, nom. pl. -dagas] In days of yore, formerly; ōlim, antīquĭtus :-- Hie gesetton ðá Sennar geárdagum then they occupied Shinar in days of old, Cd. 80; Th. 99, 36; Gen. 1657 : Exon.16 a; Th. 35, 17; Cri. 559 : Andr. Kmbl. 3036; An. 1521 : Elen. Grm. 291 : 834. gear-dagum