1. foul, befoul, defile, maculate, dishonor, disgrace, dishonour, attaint, shame

usage: spot, stain, or pollute; "The townspeople defiled the river by emptying raw sewage into it"


1. befouled, fouled, dirty (vs. clean), soiled, unclean

usage: made dirty or foul; "a building befouled with soot"; "breathing air fouled and darkened with factory soot"

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