Stygian

详细解释:a. 冥河的, 阴森森的, 幽暗的, 不可侵犯的, 不可违背的

英语解释：

形容词 stygian:

hellish- Miltondark and dismal as of the rivers Acheron and Styx in Hades-Wordsworth同义词：Acheronian, Acherontic