1. Plural of devilry; mischievous or playfully naughty behavior; pranks or tricks.
Usage: Usually plural; often used to describe lighthearted mischief rather than serious wrongdoing
2. Wicked or evil behavior; malicious acts or wickedness.
Usage: Less common than the playful sense; implies more serious wrongdoing

Examples

• The children's devilries in the classroom included hiding the teacher's chalk and rearranging the desks.
• His youthful devilries were nothing more than harmless pranks.
• The teenagers got into all sorts of devilries at summer camp.
• She was known for her playful devilries and quick wit.
• The old stories spoke of the devilries committed by the mischievous sprite.
• Their Halloween devilries included fake spiders and creaky floorboards.