The story
- Proto-Germanic*skaþô
- Proto-West Germanic*skaþō
- Old High Germanskado
- Middle High Germanschade
- GermanSchaden
- Proto-Indo-European*prew-
- Proto-Germanic*frawaz
- Proto-Germanic*frawiþō
- Old High Germanfrewida
- Middle High Germanvröude
- GermanFreude
- GermanSchadenfreude
- English todayschadenfreude
An unadapted borrowing from German Schadenfreude (“joy in the misfortune of others”), from Schaden (“damage, misfortune”) + Freude (“joy”). The word gained popularity in English in the late 20th c. and likely entered mainstream usage through an episode of The Simpsons (more in citations).
Etymology from Wiktionary, CC BY-SA 4.0.