FoeAn adversary in a blood feud.

God used this word 7 times in Scripture: 6 times to Israel in their Masoretic Text Old Testament, and once to Israel in their Koine Greek Old Testament book of Matthew.

A blood feud is different than a war.  Wars are fought for control of territory and people by nations.  Blood feuds are between or within families or tribes for reasons of revenge.

See also Enemy, Enmity, Revenge, Vengeance