Besmears is a verb that means to tarnish or stain someone's reputation by making them appear bad or untrustworthy. Some synonyms that can be used instead of besmears include defame, slander, vilify, malign, smear, and discredit. Defame means to damage someone's reputation by spreading false information about them. Slander is similar, but it deals with spoken defamation. Vilify means to attack someone's character by making them look evil or wicked. Malign refers to criticizing someone harshly and unfairly. Smear means to spread or rub something on someone or something in a way that makes them look bad. And discredit means to throw doubt on someone's character or reputation.