befoul

动词 befoul:

1. spot, stain, or pollute
   同义词：foul, defile, maculate

be.foul

v.tr.（及物动词）
be.fouled,be.foul.ing,be.fouls
To make dirty; soil.See Synonyms at contaminate
使变脏；弄脏参见 contaminate
To cast aspersions upon; speak badly of.
污蔑：中伤；说坏话