wilful
adj. C1 Advanced UK //wˈɪlfəl// wil·ful
adj. describing someone who does something on purpose, even if it is wrong or dangerous. It shows a person is being stubborn or not caring about the rules.
adj. intentional and deliberate, especially in a way that is reckless, disobedient, or defiant. Often carries a negative connotation of disregard for consequences or authority.
The wilful child refused to follow the rules.
The judge ruled that the company's failure to report the leak was wilful, leading to a heavy fine.
While some mistakes are simply the result of carelessness, a wilful disregard for safety protocols suggests a deeper institutional failure to prioritize human life over profit.
From Middle English wilful; equivalent to will + -ful.