pensive
Concise Oxford English Dictionary © 2008 Oxford University Press:
pensive/ˈpensɪv/
▶adjective engaged in deep thought.
– derivatives
pensively adverb,
pensiveness noun.
pensively adverb,
pensiveness noun.
– origin ME: from OFr. pensif, -ive, from penser ‘think’, from L. pensare ‘ponder’.
'pensive' also found in these Oxford entries:

