SKIP TO CONTENT

fiendish

/ˈfindɪʃ/
IPA guide

To be fiendish is to be cruel or evil. You might choose not to watch horror films — or soap operas — if you're not a fan of seeing people do fiendish things to each other.

Fiendish behavior is terrible and vicious, and fiendish people behave without kindness or conscience. An informal, less serious way to use the adjective is to mean "complicated or difficult." You might, for example, describe your fiendish calculus exam or rave about the fiendish plot in your favorite book. Fiendish comes from fiend, "evil spirit," with its Old English root feogan, "to hate."

Definitions of fiendish
  1. adjective
    extremely evil or cruel; expressive of cruelty or befitting hell
    “a fiendish despot”
    evil
    morally bad or wrong
Cite this entry
Style:
MLA
  • MLA
  • APA
  • Chicago

Copy citation
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘fiendish'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors. Send us feedback
Word Family