befoul /bi-fowlˈ/

1. To make foul
2. To soil

• tankage
• tankages
• tankard
• tankards
• tankas
• tankbuster
• tankbusters
• tankbusting
• tankbustings
• tank car
• tank cars
• tanked
• tanked up
• tank engine
• tank engines
• tanker
• tankered
• tankering
• tankers
• tank farm
• tank-farmer
• tank-farmers
• tank-farming
• tank farms
• tankful