IPA: /ˈnɔːtɪli/
KK: /ˈnɔːtɪli/
In a way that shows bad behavior or mischief, often in a playful or cheeky manner.
The child smiled naughtily after sneaking a cookie from the jar.
Naughtily → It is formed from "naught" (from Old English "nawiht", meaning nothing or worthless) and the suffix "-ily" (meaning in a manner of). The word "naughtily" means in a manner that is considered to be nothing or worthless, often referring to mischievous behavior.
Think of 'naught' meaning nothing or worthless, and remember that 'naughtily' describes behavior that is mischievous or not serious.