Language of origin: German
About the Word:
The German Schaden means "damage"; Freude means "joy"; the compound Schadenfreude means "enjoyment obtained from the troubles of others."
As the Schadenfreude song from Avenue Q puts it: "And when I see how sad you are / It sort of makes me... / Happy!"
(from Merriam-Webster's list "10 favorite words from foreign languages")