impenetrable /im-penˈi-trə-bl/

1. Incapable of being penetrated
2. Impervious
3. Inscrutable
4. Occupying space exclusively (physics)

• plans
• plant
• planta
• plantable
• plantage
• Plantagenet
• plantages
• Plantaginaceae
• plantaginaceous
• plantain
• plantain-eater
• plantain-eaters
• plantain lilies
• plantain lily
• plantains
• planta pedis
• plantar
• plantar fasciitis
• plantas
• plant-association
• plant-associations
• plantation
• plantations
• plantation song
• plantation songs