STUBBORN

[adjective] [esp. disapproving] - (of a person) determined to do what they want and refusing to do anything else, or (of an object) difficult to move, change or deal withI don't know who's more stubborn, you or your grandmother - neither of you will compromise.As a table-tennis player, he was famed for his stubborn resistance and his refusal to accept defeat.Stubborn stains can be removed using a small amount of detergent.Unemployment is a stubborn problem which won't just disappear overnight.