Pensive
PEN'SIVE, adjective [Latin penso, to weigh, to consider; pendo, to weigh.]
1. Literally, thoughtful; employed in serious study or reflection; but it often implies some degree of sorrow, anxiety, depression or gloom of mind; thoughtful and sad, or sorrowful.
Anxious cares the pensive nymph oppress'd.
2. Expressing thoughtfulness with sadness; as pensive numbers; pensive strains.