| Adv. | 1. | thoughtfully - in a thoughtful manner; "he stared thoughtfully out the window" Antonyms: thoughtlessly, unthinking, unthinkingly - in a thoughtless manner; "he stared thoughtlessly at the picture" |
| 2. | thoughtfully - showing thoughtfulness; "he had thoughtfully brought with him some food" Antonyms: thoughtlessly - showing thoughtlessness; "he treated his parents thoughtlessly" |