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

• law student
• law-abiding
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• law-makers
• lawbreaker
• lawcourt
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• lawfully
• lawfully-begotten
• lawfulness
• lawgiver
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• lawlessly
• lawlessness
• lawmaker
• lawmaking
• lawman
• lawn
• lawn bowling
• lawn cart
• lawn chair
• lawn furniture
• lawn mower
• lawn party
• lawn tennis