impenetrate /im-penˈi-trāt/

1. To permeate
2. To penetrate thoroughly

impenetrāˈtion noun

• insomuch
• insooth
• in sort
• insouciance
• insouciances
• insouciant
• insouciantly
• insoul
• insouled
• insouling
• insoulment
• insoulments
• insouls
• in-source
• in-sourced
• in-sources
• in-sourcing
• in spades
• inspan
• inspanned
• inspanning
• inspans
• in spate
• in special
• in specie