blackener
/ˈblækənər/
noun
- A substance or thing that makes something black.
- This shoe polish is a strong blackener for leather boots.
- The chemical blackener turned the metal surface completely dark.
- The artist used a blackener to darken the background of the painting.
- A person or thing that damages someone's reputation.
- The anonymous online posts acted as a blackener of the company's image.
- He was a blackener of truth, spreading lies about his rivals.
- The gossip columnist was known as a blackener of celebrities' reputations.