thoughtless
1. Showing lack of careful thought.
2. Without care or thought for others; SYN. uncaring, unthinking.
careless · deaf · heedless · inconsiderate · indifferent · regardless · uncaring · unconsidered · unheeding · unreflective · unthinking · unthoughtful
thought · thought experiment · thoughtful · thoughtfully · thoughtfulness · thoughtless · thoughtlessly · thoughtlessness · thoughtography · thought-out · thought-provoking