tactful -- (having or showing a sense of what is fitting and considerate in dealing with others; "she was tactful enough not to shatter his illusion"; "a tactful remark eased her embarrassment")
tactful, kid-glove -- (showing skill and sensitivity in dealing with people; "by diplomatic conduct he avoided antagonizing anyone"; "a tactful way of correcting someone"; "the agency got the kid-glove treatment on Capitol Hill")