1. Characterized by effort to the point of exhaustion; especially physical effort
   - arduous, backbreaking, grueling [US], gruelling [Brit, Cdn], hard, heavy, laborious, operose, punishing

See also: effortful, toilsomeness

• fanaticize
• fanatism
• fanciable
• fancied
• fancier
• fanciful
• fancifully
• fancify
• Fanconi's anaemia
• Fanconi's anemia
• fancy
• fancy dress
• fancy goods
• fancy man
• fancy that
• fancy up
• fancy woman
• fancy-dress ball
• fancy-free
• fancywork
• fandango
• fandom
• fane
• fanfare
• fanfaronade