fiendish
/ˈfindɪʃ/
adjective
- Extremely cruel or evil.
- The villain had a fiendish plan to destroy the city.
- The prisoners suffered under the fiendish guards.
- Her fiendish laughter sent chills down everyone's spine.
- Very clever in a tricky or unpleasant way.
- The maze had a fiendish design that confused everyone.
- The puzzle was fiendish and took me hours to solve.
- He came up with a fiendish scheme to cheat on the test.
- Extremely difficult or challenging.
- Climbing that mountain in winter is a fiendish task.
- She set a fiendish pace during the marathon.
- The final exam was fiendish; hardly anyone passed.