befoul /bi-fowlˈ/

1. To make foul
2. To soil

• ultracrepidates
• ultracrepidating
• ultra-distance
• ultrafiche
• ultrafiches
• ultrafilter
• ultrafiltered
• ultrafiltering
• ultrafilters
• ultrafiltrate
• ultrafiltrates
• ultrafiltration
• ultra-heat-treated
• ultra-high
• ultra-high frequency
• ultra-high vacuum
• ultraism
• ultraisms
• ultraist
• ultraists
• ultramarathon
• ultramarathons
• ultramarine
• ultramarines
• ultramicro-