Be-greósan

According to the Old English Dictionary:

be-greósan

p. -greás, pl. -gruron; pp. -groren To overwhelm fearfully; horrore afficere, formidolose obruere? - Atole gástas súsle begrorene [MS. begrorenne] the horrid spirits fearfully overwhelmed with torment, Cd. 214; Th. 268, 9. be-greosan