sully
[ suhl-ee ]
make dirty or spotty
USE 1
The artist refused to let any critique sully his vision for the new exhibit, believing firmly in the value of his work.
USE 2
Environmentalists argue that building a factory here would sully the natural beauty of the coastline, harming wildlife and deterring tourists.
USE 3
The scandal will undoubtedly sully the politician’s reputation, making it difficult for him to win the next election.