0 careful not to say or do anything that could upset someone: --
Mentioning his baldness wasn't very tactful.
Have not the police been most efficient and tactful in carrying out their duties?
I shall try to be as loyal and as tactful as possible in my comments on this situation.
I am more tactful than to make such remarks about our football team.
I hope that is a tactful way of putting it.
Everybody knows it, and there is no use any longer being diplomatic and tactful about it.
I have found them sensible, tactful, sympathetic, tolerant and helpful.
I entirely agree that it was the most tactful way of saying it.
He was not the most tactful of men at times, but he was not incompetent; nobody would say that he was.