Is the word Profane used correctly?

The general's widow withheld from biographers information that she feared would profane his reputation.

Yes.

Yes. Perhaps "blemish" would be a better choice.

Yes, the word "profane" is used correctly in this sentence.

"Profane" is an adjective that means showing disrespect or contempt towards sacred or religious things, or to something that is considered to be holy or revered. In this sentence, the word "profane" is used to describe information that could potentially tarnish the reputation of the general. By withholding this information, the general's widow is preventing anything that may disrespect or dishonor his reputation.

To confirm the correct usage of the word, you can consult a dictionary or a trusted resource to verify its meaning and how it is used in different contexts. In this case, the sentence accurately reflects the definition of "profane."