adj.（悲伤的）思考的
Merriam-Webster Online Dictionary
pensive (adjective)1.
musingly or dreamily - thoughtful
2.
suggestive of sad thoughtfulness
Merriam-Webster Online Thesaurus
pensive (adjective)given to or marked by long, quiet thinking
SYNONYMS:
broody, cogitative, meditative, melancholy, musing, pensive, reflective, ruminant, ruminative, thoughtfulRELATED WORDS:
introspective, retrospective, self-reflective; earnest, grave, sedate, serious, serious-minded, severe, sober, solemn, somber ( sombre), weighty; philosophical ( philosophic); analytic ( analytical), logical, rational; deliberate, purposeful; absentminded, abstracted, preoccupiedNEAR ANTONYMS:
featherbrained, flighty, flippant, frivolous, goofy, harebrained, light-headed, scatterbrained; brainless, mindless, silly, thoughtless, unthinking