1. A Titan whose punishment in the infernal world was to roll a stone up a hill, which no sooner reached the top than it came bounding back again and had to be rolled up anew.

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

• sisypus,
• aisyphus,
• zisyphus,
• xisyphus,
• disyphus,
• eisyphus,
• wisyphus,
• susyphus,
• sjsyphus,
• sksyphus,
• sosyphus,
• s9syphus,
• s8syphus,
• siayphus,
• sicyphus,
• sisiphus,
• Aisaphus,
• Siciphus,
• SSisiphus,
• Sisiphos

The adjective form of "Sisyphus" is "Sisyphean".