IPA: /ˈdɛv.ɪ.lɪʃ/
KK: /ˈdɛvəlɪʃ/
Relating to or resembling a devil; often used to describe something that is wicked, mischievous, or excessively intense.
The children played a devilish prank on their teacher.
In a manner that is extremely or very intense, often with a mischievous or wicked connotation.
She smiled devilishly as she revealed her clever plan.
Devilish → It is formed from "devil" (from Old French *devil*, meaning an evil spirit or demon) and "-ish" (meaning having the quality of). The word "devilish" describes something that has the qualities or characteristics of a devil, often implying wickedness or mischief.
Think of the word 'devil' which represents an evil spirit, and remember that 'devilish' means having the qualities of a devil.