befoul

  1. To make foul; to soil; to contaminate, pollute.
  2. (specifically) To defecate on, to soil with excrement.
  3. (figuratively) To stain or mar (for example with infamy or disgrace).
  4. To entangle or run against so as to impede motion.

Pronounced as (IPA)
/bɪˈfaʊl/
Etymology

From be- + foul.

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