impugn (verb)

1. In the comic book, the superhero impugned the villain's evil plan and proved it to be false.

2. In the cartoon show, the character always impugns his rival's intelligence and often ends up in funny situations.

3. The protagonist of the novel impugns the corrupt government and fights for justice.

4. During the stand-up comedy routine, the comedian impugned the stereotype and turned it into a hilarious punchline.