impenetrable /im-penˈi-trə-bl/

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

impenetrabilˈity noun

• droob
• droobs
• droog
• droogish
• droogs
• drook
• drooked
• drooking
• drookings
• drookit
• drooks
• drool
• drooled
• drooling
• drools
• droolworthy
• droome
• droomes
• droop
• drooped
• droopier
• droopiest
• droopily
• droopiness
• droopinesses