fiendish

From fiend + -ish.

• IPA^(key): /ˈfiːndɪʃ/

• Audio (Southern England):

  (file)

fiendish (comparative more fiendish, superlative most fiendish)

1. Sinister; evil; like a fiend.

   Synonym: conniving

   The detective was puzzled by the fiendish plot to steal the diamonds.

   She had a fiendish smile that hinted at a cunning plan.

2. Very difficult.

   The exam was filled with fiendish questions that made no sense.

   a fiendish crossword puzzle

• fiendishly
• fiendishness

• finished