untactful (adj.)

• airy
• blanket
• brash
• careless
• casual
• cursory
• degage
• easygoing
• flippant
• forgetful
• general
• heedless
• impolitic
• imprudent
• inconsiderate
• indifferent
• indiscreet
• indiscriminate
• insensitive
• insouciant
• lazy
• maladroit
• nonjudgmental
• oblivious
• offhand
• perfunctory
• promiscuous
• reckless
• regardless
• tactless
• thoughtless
• uncritical
• undemanding
• undiplomatic
• undiscriminating
• unexacting
• unfastidious
• unheeding
• unmindful
• unprepared
• unready
• unselective
• unsubtle
• unthinking
• wholesale