tactlessEnglishOxford New American Dictionarytactless /ˈtak(t)ləs, ˈtæk(t)ləs / ▸ adjective having or showing a lack of adroitness and sensitivity in dealing with others or with difficult issues: a tactless remark. – DERIVATIVES tactlessly /ˈtak(t)ləslē, ˈtæk(t)ləsli/ adverb,tactlessness /ˈtak(t)ləsnəs, ˈtæk(t)ləsnəs / noun