1. Both extremely effortful and futile 
2. Of or relating to Sisyphus

See also: effortful, Sisyphus

Encyclopedia: Sisyphean

• expressage
• expressed
• expressed almond oil
• expressible
• expression
• expressional
• expressionism
• expressionist
• expressionistic
• expressionless
• expressive
• expressive aphasia
• expressive style
• expressively
• expressiveness
• expressly
• expresso
• expressway
• expropriate
• expropriation
• expulse
• expulsion
• expulsive
• expunction
• expunge