bad blood

a deep-seated ill will there's been bad blood between the two families for years Synonyms animosity, animus, antagonism, antipathy, enmity, bitterness, gall, grudge, hostility, jaundice, rancorRelated Words blood feud, feud, score, vendetta; hate, hatred, loathing; vindictiveness, virulence, vitriol; alienation, disaffection, estrangement; conflict, coolness, discord, friction, strain, tension; inhospitableness, unfriendliness; malice, malignancy, malignity, spite, spitefulness, venomNear Antonyms amiability, amicability, civility, cordiality, friendliness, hospitality, neighborliness; comity, empathy, friendship, goodwill, sympathy, understandingAntonyms amity