thoughtful -- (having intellectual depth; "a deeply thoughtful essay")
thoughtful -- (exhibiting or characterized by careful thought; "a thoughtful paper")
thoughtful, serious-minded -- (acting with or showing thought and good sense; "a sensible young man")
heedful, attentive, thoughtful, paying attention -- (taking heed; giving close and thoughtful attention; "heedful of the warnings"; "so heedful a writer"; "heedful of what they were doing")
thoughtful -- (considerate of the feelings or well-being of others)
(Sound)
