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

See also: effortful

• banausic
• banco
• band
• band aid
• Band of Partisans
• band oneself
• band together
• band-tail pigeon
• band-tailed pigeon
• bandage
• bandaged
• bandaging
• bandana
• bandanna
• bandbox
• bandeau
• banded
• banded adder
• banded anteater
• banded gecko
• banded krait
• banded palm civet
• banded purple
• banded rattlesnake
• banded rudderfish