Grudging means doing something reluctantly or unwillingly, often with a feeling of resentment or ill will. It can also refer to an unwillingness to give credit or acknowledge someone's achievements.
He does, of course, deserve a certain amount of grudging respect for this process of continually relevant reinvention. (sbnation.com)
«He mobilized the English language and sent it into battle,» one of Churchill's rivals says with grudging admiration after that aforementioned speech. (southflorida.com)
But as I gazed around the gym at those students, I started to feel something that went beyond grudging acceptance for my new career. (edutopia.org)