impenetrable /im-penˈi-trə-bl/

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

impenetrabilˈity noun

• mandragora
• mandragoras
• mandrake
• mandrakes
• mandrel
• mandrels
• mandril
• mandrill
• mandrills
• mandrils
• manducable
• manducate
• manducated
• manducates
• manducating
• manducation
• manducations
• manducatory
• mandylion
• mandylions
• -mane
• mane
• man-eater
• man-eaters
• man-eating