noun
- the quality of being extremely cruel, wicked, or evil
- the quality of being extremely difficult or challenging
Usage: informal
Examples
- The fiendishness of the villain’s plan shocked everyone.
- She was appalled by the fiendishness of the crime.
- The puzzle’s fiendishness made it nearly impossible to solve.
- His fiendishness in business dealings earned him many enemies.
- The fiendishness of the math problem frustrated the students.
- The novel explored the fiendishness of human nature.
- The fiendishness of the trap caught even experienced hunters off guard.