1. Hellish
   "Hence loathed Melancholy.../In Stygian cave forlorn" 
2. Dark and dismal as of the rivers Acheron and Styx in Hades
   "upon those roseate lips a Stygian hue"
   - Acheronian, Acherontic

See also: dark, infernal

• Kalapuyan
• Kalashnikov
• Kalashnikov culture
• kale
• kaleidoscope
• kaleidoscopic
• kaleidoscopical
• kaleidoscopically
• kalemia
• kali
• kalian
• kalif
• Kalimantan
• Kalinin
• kaliph
• kaliuresis
• Kalka
• Kalki
• Kallman's syndrome
• kalmia
• Kalmia angustifolia
• Kalmia latifolia
• Kalmia polifolia
• Kalon Tripa
• Kalotermes