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

See also: effortful

• celery root
• celery salt
• celery seed
• char
• Chara
• charabanc
• Characeae
• characid
• Characidae
• characin
• characin fish
• Characinidae
• character
• character actor
• character assassination
• character printer
• character reference
• character set
• character witness
• character-at-a-time printer
• characterisation
• characterise
• characterisic function
• characteristic
• characteristic curve