Gebéldan

According to the Old English Dictionary:

gebéldan

p. de :-- Eðiluald hit [the book] úta giðryde and gibélde Ethelwald made it firm on the outside and covered it, Jn. Skt. p. 188, 3. See note 8, p. viii. Or is it the verb gebeldan [from bald] used in the sense of 'strengthen?' cf. note 7, on giðryde and the connection suggested with ðryþ. gebeldan