Willful means doing something on purpose, especially when you know you shouldn't. When a child commits a willful act of disobedience, they're not accidentally breaking a rule or forgetting what they were told. They heard the instruction clearly, understood it, and chose to ignore it anyway.

The word carries a sense of stubbornness and determination. A willful person knows exactly what they're doing and pushes ahead despite warnings, rules, or consequences. If you willfully ignore your teacher's reminder to bring your permission slip, you can't claim you forgot. You just decided not to do it.

Willful often appears in legal or formal contexts. Courts talk about willful negligence when someone deliberately fails to take care they know they should take. A willful violation of safety rules means someone knew the rules existed and broke them anyway.

The word can describe personality too. A willful child is one who insists on having their own way and resists guidance or correction. While determination and independence can be admirable qualities, willfulness suggests pushing against reasonable boundaries or refusing to listen to good advice. There's a difference between being confident in your decisions and being willfully stubborn about getting your way no matter what.