grudge

Concise Oxford English Dictionary © 2008 Oxford University Press:
grudge/ɡrʌʤ/

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

• 1 be resentfully unwilling to grant or allow (something).

• 2 feel resentful that (someone) has achieved (something): I don't grudge him his moment of triumph.

– derivatives
grudger noun,
grudging adjective,
grudgingly adverb,
grudgingness noun.

– origin ME: var. of obs. grutch ‘complain, murmur’, from OFr. grouchier, of unknown origin; cf. grouch.