Nuance Dictionary / Complex Emotions
씁쓸하다 sseup-sseul-ha-da
Bittersweet, leaving a slightly cynical or unpleasant emotional aftertaste
Like drinking black coffee. You feel this when you realize a harsh truth about the world, or when someone you used to hate fails completely and you thought you'd be happy, but instead you just feel '씁쓸하다'—a complex, cynical sadness.