D defs.my
Entry 1 sense Webster, 1913

Rancor

/(răṉ"kẽr)/ · Ran·cor · IPA /ˈɹæ̝ŋkɚ/
01 n. The deepest malignity or spite; deep-seated enmity or malice; inveterate hatred.
  1. 1.
    The deepest malignity or spite; deep-seated enmity or malice; inveterate hatred.
    “It would not be easy to conceive the passion, rancor, and malice of their tongues and hearts.” Burke.
    Rancor will out; proud prelate, in thy face I see thy fury.” Shak.
    Rancor is that degree of malice which preys upon the possessor.” — Cogan.
Syn. Enmity; hatred; ill will; malice; spite; grudge; animosity; malignity.
-- Rancor, Enmity. Enmity and rancor both describe hostile feelings; but enmity may be generous and open, while rancor implies personal malice of the worst and most enduring nature, and is the strongest word in our language to express hostile feelings.