impenetrable /im-penˈi-trə-bl/

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

• palazzo
• palazzo pants
• pale
• pale-
• palea
• paleaceous
• paleae
• pale ale
• pale ales
• palebuck
• palebucks
• paled
• pale-dead
• pale-eyed
• paleface
• palefaces
• pale-hearted
• palely
• palempore
• palempores
• paleness
• palenesses
• paleo-
• paler
• pales