Tarnish

He is afraid that he will tarnish his reputation if he disagrees.

Old love does not tarnish.

Sami was trying to tarnish Layla's reputation.

1918, Hannah Teresa Rowley, Mrs. Helen Louise (Wales) Farrell, Principles of Chemistry Applied to the Household Precipitated calcium carbonate, a very fine powdery form, is used as a basis for many tooth powders and pastes. As whiting it finds a wide use in cleaning metals of their tarnishes.

Limiting the use of silver to special occasions might invite tarnish unless the pieces are carefully protected.

Careful storage of silver will prevent it from tarnishing.

He is afraid that she will tarnish his reputation if he disagrees with her.

I have next shown you the Greeks, and " the wisdom" of their philosophy, often travesting, sometimes tarnishing the Christian religion : […]

The greed that many players show tarnishes the game.

There are normally anti-embarrassment clauses in such arrangements and, from a corporate social responsibility point of view, the upside of standing by a tarnished individual is often outweighed by the downside.