1. Pertaining to the Styx; hellish; infernal.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• stygma,
• surgian,
• stagin,
• atygian,
• ztygian,
• xtygian,
• dtygian,
• etygian,
• wtygian,
• srygian,
• sfygian,
• sgygian,
• syygian,
• stygan,
• stygain,
• stygien,
• eutycian,
• hygian,
• oggygian,
• styigal

• stagnation,
• stigmatic,
• stagehand,
• St Jean,
• stagnant,
• staging,
• stegner,
• stigmata,
• stegman,
• stigma,
• stagner,
• stogner,
• stegeman,
• stagnate,
• stagnancy,
• staginess,
• stagnaro,
• steganopus.

The adjective form of the word "stygian" is "stygian".

The plural form of the word "stygian" is "stygians".

The singular form of the word "stygian" remains the same, as it is an adjective without a distinct singular or plural form.