Adjective: befouled bi'fawld- Made dirty or foul
"a building befouled with soot";
- fouled
Verb: befoul bi'fawl- Spoil, spot, stain, or pollute
"The oil spill befouled the coastline";
- foul, defile, maculate [literary]
See also: dirty, soiled, unclean
Type of: attaint [archaic], disgrace, dishonor [US], dishonour [Brit, Cdn], shame