diabolise

/daɪˈæbəlaɪz/
verb
  1. To represent or portray someone or something as evil, wicked, or devilish.
    • The media often diabolises political opponents to sway public opinion.
    • Some historians argue that later writers diabolised the emperor unfairly.
    • In the story, the author diabolises the stepmother to make her a clear villain.
Antonyms
What does "diabolise" mean? | whatsthatwordmean | whatsthatwordmean