rancor (US) noun
or British rancour /ˈræŋkɚ/ or British rancour /ˈræŋkɚ/ Learner's definition of RANCOR
[noncount] formal
: an angry feeling of hatred or dislike for someone who has treated you unfairly愤恨；怨恨 -
She answered her accusers calmly and without rancor.她平静地回复了指责她的人们，毫无怨恨之意。
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In the end, the debate created a degree of rancor among the committee members.最后，这场争辩致使委员会成员之间产生了一定程度的怨恨。
— rancorous
(US) or British rancourous /ˈræŋkərəs/ adjective [more rancorous; most rancorous]