or
or
Even though the former boss has always been rude with me, I do not hold any more ___ against him.
The correct word to complete the sentence is "grudge."
The sentence would be: "Even though the former boss has always been rude with me, I do not hold any more grudge against him."
A "grudge" refers to a lingering feeling of resentment or bitterness towards someone due to past grievances or offenses. In this context, the speaker is expressing that despite the former boss's rude behavior, they no longer hold any resentment or ill will towards him.
