Fǽ-lǽcan

According to the Old English Dictionary:

fá-lǽcan;

fǽ-lǽcan

p. -lǽhte; pp. -lǽht To be at deadly enmity, to be at feud; inĭmīcĭtiam capĭtālem mŏvēre :-- Gif hwá heora ǽnigne fǽlǽce [fálǽce MS. L.] if any one be at feud with any of them, L. Ath. i. 20; Th. i. 210, 10. fæ-læcan