impenetrate /im-penˈi-trāt/

1. To permeate
2. To penetrate thoroughly

impenetrāˈtion noun

• Standardbred
• standard candle
• standard cost
• standard costs
• standard deviation
• standard deviations
• standard English
• standard error
• standard errors
• standard gauge
• Standard grade
• standardisation
• standardise
• standardised
• standardiser
• standardisers
• standardises
• standardising
• standardization
• standardize
• standardized
• standardized mortality rate
• standardizer
• standardizers
• standardizes