A-wurþan
Bosworth & Toller Anglo-Saxon Old English Dictionary - a-wurþan
According to the Old English Dictionary:
ic -wurþe, he -wurþeþ,
- a-wurþan
- pl. -wurþaþ ; p. -wearþ, pl. -wurdon pp. -worden To cease to be, become insipid or worthless; evanescere :-- -Ðæt ge awurþaþ [wurþaþ MS.] that ye perish [cease to be], Deut. 4, 26.