a. full of deep-seated enmity or, malice, or hatred
Negotiations between the two sides have gone nowhere for five months and have become particularly rancorous in the past month as bailout and debt repayment deadlines came and went.
Sentence in Classic:
And the consciousness that the insult was not yet avenged, that his rancor was still unspent, weighed on his heart and poisoned the artificial tranquillity which he managed to obtain in Turkey by means of restless, plodding, and rather vainglorious and ambitious activity.
War and Peace(V3) By Leo Tolstoy Context
The most discontented, the most irritated, the most trembling, saluted it; whatever our egotism and our rancor may be, a mysterious respect springs from events in which we are sensible of the collaboration of some one who is working above man.
Les Misérables (V4) By Victor Hugo Context