Adjective tactless has 3 senses
  1. tactless, untactful - lacking or showing a lack of what is fitting and considerate in dealing with others; "in the circumstances it was tactless to ask her age"
    Antonyms: tactful, discerning, discreet
  2. tactless, undiplomatic - showing skill in handling difficult situations
    Antonym: politic (indirect, via impolitic)
  3. inept, tactless - revealing lack of perceptiveness or judgment or finesse; "an inept remark"; "it was tactless to bring up those disagreeable"
    Antonym: adroit (indirect, via maladroit)
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