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

• lobster plant
• lobster pot
• lobster stew
• lobster tail
• lobster tart
• lobster thermidor
• lobster-backed
• lobsterback
• lobsterman
• lobular
• Lobularia
• Lobularia maritima
• lobularity
• lobulated
• lobule
• lobworm
• local
• local anaesthesia
• local anaesthetic
• local anesthesia
• local anesthetic
• local area network
• local authority
• local call
• local department