1. the quality or state of being unwilling to give, spend, or allow something; reluctance or resentment in giving or granting.
Usage: abstract noun derived from the adjective 'grudging'; formal register

Examples

• The grudgingness of his apology made it clear he didn't truly regret his actions.
• She accepted the help with a grudgingness that offended her friend.
• His grudgingness in sharing resources created tension within the team.
• The grudgingness of the donation suggested it was made out of obligation rather than kindness.
• Despite the grudgingness of his response, he eventually agreed to help.