impenetrate /im-penˈi-trāt/

1. To permeate
2. To penetrate thoroughly

impenetrāˈtion noun

• richnesses
• rich rhyme
• richt
• Richter scale
• ricier
• riciest
• ricin
• ricing
• ricinoleic
• ricinoleic acid
• ricins
• Ricinulei
• Ricinus
• rick
• rick-barton
• rick-bartons
• rick-burner
• rick-burners
• ricked
• ricker
• rickers
• ricket
• ricketier
• ricketiest
• ricketily