"tactful" in the adjective sense
1. 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"
2. 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"
Source: WordNet® (An amazing lexical database of English)
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