1. lacking in consideration for others; inconsiderate; tactless: a thoughtless remark.
2. characterized by or showing lack of thought: a shallow, thoughtless book.
3. not thinking enough; careless or heedless: thoughtless of his health.
4. devoid of or lacking capacity for thought.
"people can be thoughtless in things."
"people can be thoughtless."
"actions can be thoughtless."
"exploitations can be thoughtless."
"degradations can be thoughtless."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.