Sty·gi·an /ˈstɪdʒiən/ adjectiveadj [usually before noun] literary DARKunpleasantly dark, and making you feel nervous or afraid 阴暗的;阴森森的 Stygian• Stygian caverns• No green flash, nothing, and the sky above fading from blue through green to the beginning of Stygian darkness.• She lowered her head and entered the Stygian darkness.• We navigated the Stygian gloom of the corridor arm in arm like a quaint, old-fashioned couple.