be·smirch 
/bɪˈsmɚtʃ/ verb
be·smirch·es; be·smirched; be·smirch·ing /bɪˈsmɚtʃ/ verb [+ obj] : to cause harm or damage to (the reputation of someone or something)
▪ He has besmirched [=sullied] her reputation/name/honor by telling lies about her. [=he has caused people to have a low opinion of her]
▪ He has besmirched [=sullied] her reputation/name/honor by telling lies about her. [=he has caused people to have a low opinion of her]
