Read the dictionary definition of smirch. All definitions for this word.
1. an act that brings discredit to the person who does it
1. he made a huge blot on his copybook
2. a blemish made by dirt
1. he had a smudge on his cheek
3. charge falsely or with malicious intent; attack the good name and reputation of someone
1. The journalists have defamed me!
2. The article in the paper sullied my reputation
4. smear so as to make dirty or stained