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

See also: effortful

• constrict
• constricted
• constricting
• constriction
• constrictive
• constrictor
• Constrictor constrictor
• constringe
• constringent
• construal
• construct
• construction
• construction industry
• construction paper
• construction worker
• constructional
• constructionist
• constructive
• constructive breach
• constructive eviction
• constructive fraud
• constructive metabolism
• constructive possession
• constructive trust
• constructive-metabolic