v. Obs. [OE. ætberstan, (oðberstan) f. AT- pref.2 + berstan to BURST.] intr. (with dat.) To burst away, escape (from).
c. 1000. Ælfric, Gen. xiv. 13. Ða ætbærst him sum man.
c. 1200. Ormin, 14734. All swa summ Ysaac attbrasst Unnwundedd & unnwemmedd.
c. 1250. Bestiary, 672, in O. E. Misc., 21. Ðis elp tus atbresteð ðis huntes breid.