動詞 besmirch:

1. charge falsely or with malicious intent; attack the good name and reputation of someone
   同義詞：defame, slander, smirch, asperse, denigrate, calumniate, smear, sully
2. smear so as to make dirty or stained
   同義詞：smirch

be.smirch

v.tr.（及物動詞）
be.smirched,be.smirch.ing,be.smirch.es
To stain; sully:
玷污；污損：
例句：
a reputation that was besmirched by slander.
名譽被誹謗所玷污

To make dirty; soil.
弄臟；弄污

【引伸】
besmirch.er
n.（名詞）
besmirch.ment
n.（名詞）