grudge
US /ɡrʌdʒ/
UK /ɡrʌdʒ/

1.
a persistent feeling of ill will or resentment resulting from a past insult or injury
:
•
She held a grudge against him for years after their argument.
•
It's hard to let go of a grudge, but it's necessary for peace of mind.
1.
to give or allow (something) unwillingly, reluctantly, or resentfully
:
•
I don't grudge him his success; he worked hard for it.
•
She didn't grudge the extra hours she spent helping her friend.