n. & v.
n. 1 prolonged mutual hostility, esp. between two families, tribes, etc., with murderous assaults in revenge for a previous injury (a family feud; be at feud with). 2 a prolonged or bitter quarrel or dispute.
v.intr. conduct a feud.
[ ME fede f. OF feide, fede f. MDu., MLG vede f. Gmc, rel. to FOE ]