pensive
Word family adverbpensivelyadjectivepensivenounpensiveness
pen·sive /ˈpensɪv/ adjectiveadj THINK ABOUTthinking a lot about something, especially because you are worried or sad 沉思的;郁郁不乐的 → thoughtful Jan looked pensive. 简神情忧伤。
—pensively adverbadv
Origin pensive (1300-1400) French pensif, from penser “to think”