The word for today is…
besmirch (verb):
: to cause harm or damage to the purity, luster, or beauty of something
Source : Merriam -Webster
Etymology : Since the prefix be- in besmirch means “to make or cause to be,” when you besmirch something, you cause it to have a smirch. What’s a smirch? A smirch is a stain, and to smirch something is to stain it or make it dirty. By extension, the verb smirch came to mean “to bring discredit or disgrace on.” Smirch and besmirch, then, mean essentially the same thing.
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