Óþ-berstan

According to the Old English Dictionary:

óþ-berstan

to break away, escape :-- Hé óþbærst tó wuda, Cod. Dip. Kmbl. iii. 291, 17. [Rannulf út of ðam týre on Lunden nihtes óðbærst, ðǽr hé on hæftneþe wæs, Chr. l 101; Erl. 237, 40.] Gif se bana óþbyrste, L. H. E. 2 ; Th. i. 28, l. Cf. æt-berstan. oþ-berstan