Begrudge means to envy or resent and to be reluctant or allow.
Begrudge comes under verb.
Synonyms: covet, envy, mind, resent.
Antonyms: congratulate, welcome.
The old miser begrudged every nickel he spent.
It is obvious that you begrudge my youthfulness and charm.
If you are going to do it begrudgingly, don't bother doing it at all.