thoughtless

Từ điển American Heritage Dictionary 4th

thought·less (thôtʹlĭs)adj.
1. Marked by or showing lack of due thought or care; careless. See Synonyms at careless.
2. Inconsiderate; inattentive:
a thoughtless remark.
3. Lacking thought:
The debate turned into thoughtless bickering. thoughtʹless·ly adv.thoughtʹless·ness n.

• Từ đồng nghĩa / Synonyms:
  uncaring, unthinking