, an; m. A sudden or dangerous enemy; sŭbĭtum damnum infĕrens hostis :-- Ðæt he on ðam fǽrsceaðan feorh gerǽhte that he might reach the life of the dangerous enemy, Byrht. Th. 135, 62; By. 142.
Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "fǽr-sceaða." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 266.