1.
A ~ plan, action, or device is very clever or imaginative. (INFORMAL)
...a ~ plot.
= devilish
ADJ: usu ADJ n
~ly
This figure is reached by a ~ly clever equation.
ADV: usu ADV adj
2.
A ~ problem or task is very difficult and challenging. (INFORMAL)
...the ~ difficulty of the questions.
ADJ: ADJ n
~ly
America’s trade laws are ~ly complex.
ADV: ADV adj
3.
A ~ person enjoys being cruel.
This was a ~ act of wickedness.
ADJ: usu ADJ n