IPA: //ˈdɛv.əl.ri//
KK: /ˈdɛvəlri/
A mischievous or wicked act, often associated with evil or supernatural forces.
The children were scared by the tales of devilry that their grandparents told them.
Devilry is formed from "devil" (from Old English "deofol", meaning a malevolent supernatural being) and "-ry" (a suffix denoting a state or condition). The word "devilry" refers to the state or condition of being devilish or engaging in wickedness.
Think of the word 'devil' representing a malevolent being, and the '-ry' indicating a state, which helps you remember that 'devilry' means the state of being devilish or wicked.
No commonly confused words.