厭世悲観者[enseihikansha] pessimist
慈悲[jihi] compassion (e.g. of Buddha)
慈悲心[jihishin] benevolence
嘆き悲しむ[nagekikanashimu] to grieve and moan
悲しい[kanashii] sad

悲しむ[kanashimu] to be sad
悲哀[hiai] sorrow
悲運[hiun] sad fate
悲歌慷慨[hikakougai] indignant lamentation over the evils of the times
悲観[hikan] pessimism

哀愁[aishuu] pathos
郷愁[kyoushuu] nostalgia
愁傷[shuushou] grief
愁訴[shuuso] complaint
幽愁[yuushuu] deep contemplation

愁い[urei] sorrow
愁い顔[ureigao] sad face
憂愁[yuushuu] melancholy
旅愁[ryoshuu] loneliness on a journey
愁える[ureeru] to grieve