impenetrate /im-penˈi-trāt/

1. To permeate
2. To penetrate thoroughly

impenetrāˈtion noun

• sea feather
• sea feathers
• sea-fight
• sea-fights
• sea fir
• sea-fire
• sea-fires
• sea firs
• sea fish
• sea-fisher
• sea-fishers
• sea fishes
• sea-fishing
• sea floor
• sea floors
• sea-floor spreading
• sea foam
• sea foams
• sea fog
• sea fogs
• seafolk
• seafood
• seafoods
• seafowl
• seafowls