Be·foul v. t. [imp. & p. p. Befouled p. pr. & vb. n. Befouling.]
  1. To make foul; to soil.
  2. To entangle or run against so as to impede motion.
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  befoul
       v : spot, stain, or pollute; "The townspeople defiled the river
           by emptying raw sewage into it" [syn: foul, defile, maculate]