blackguard
/ˈblæɡərd/
verb
- To treat someone in a dishonest or abusive way; to insult or betray.
- The politician blackguarded his opponent with false accusations.
- He felt blackguarded by his so-called friend who revealed his secret.
- She warned them not to blackguard the new employee by blaming him for their mistakes.
noun
- A person who is dishonest, rude, or behaves in a morally bad way.
- She called him a blackguard after he spread lies about her.
- No one trusted the blackguard who had stolen from his own family.
- The villain in the story was a complete blackguard who cheated everyone he met.