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

• gentle wind
• gentlefolk
• gentleman
• Gentleman Jim
• Gentleman Johnny
• gentleman's gentleman
• gentleman's-cane
• gentleman-at-arms
• gentlemanlike
• gentlemanly
• gentlemen's agreement
• gentleness
• gentlewoman
• gently
• gentoo
• gentrification
• gentrify
• gentry
• genu
• genu valgum
• genu varum
• genuflect
• genuflection
• genuflexion
• genuine