fiendish

adjective
UK: /ˈfiːn.dɪʃ/
US: /ˈfiːn.dɪʃ/

  1. Extremely unpleasant or difficult; evil or cruel.

    1. The puzzle was fiendish, I couldn't solve it.
    2. The villain devised a fiendish plan to take over the city, filled with traps.

  2. Resembling or characteristic of a fiend; wicked or diabolically clever.

    1. He had a fiendish grin on his face.
    2. The chess player displayed a fiendish intellect, anticipating every move.

Synonyms

evil atrocious diabolical wicked hellish cruel devilish
fiendish adverb

  1. In an extremely unpleasant or cruel manner.

    1. The task was fiendishly hard.
    2. The enemy fiendishly launched a surprise attack during the dark night.

Frequently Asked Questions

The word "fiendish" in English means: Extremely unpleasant or difficult; evil or cruel., Resembling or characteristic of a fiend; wicked or diabolically clever..

The phonetic transcription of "fiendish" is /ˈfiːn.dɪʃ/ in British English and /ˈfiːn.dɪʃ/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "fiendish": evil, atrocious, diabolical, wicked, hellish, cruel, devilish.

Example usage of "fiendish": "The puzzle was fiendish, I couldn't solve it.". More examples on the page.