FEUD

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]