A-brégan

According to the Old English Dictionary:

a-brégan

p. de; pp. ed To alarm, frighten; terrere :-- Mec mæg gríma abrégan a phantom may frighten me, Exon, 110b; Th. 423, 7; Rä. 41, 17. Abregde, p. Bd. 3, 16; S. 543,12 : Ps. Spl. T. 79,14. a-bregan