noun

a persistent feeling of ill will or resentment resulting from a past insult or injury.

I’ve never been one to hold a grudge

grievance,resentment,bitterness,rancour,pique,umbrage,displeasure,dissatisfaction,disgruntlement,bad feelings,hard feelings,ill feelings,ill will,venom,hate,hatred,dislike,aversion,animosity,antipathy,antagonism,enmity,animus,a chip on one’s shoulder

verb

be resentfully unwilling to give or allow (something).

he grudged the work and time that the meeting involved

begrudge,resent,feel aggrieved/bitter about,be annoyed about,be angry about,be displeased about,be resentful of,mind,object to,take exception to,regret,give unwillingly,give reluctantly,give resentfully,give stintingly