/ˈwɪlfʊlnəs/ – noun
Definition: sự cố ý, sự chủ tâm, sự âm mưu.
A more thorough explanation: Wilfulness is the intentional and deliberate act of doing something with full knowledge and awareness that it is wrong or unlawful. It implies a conscious decision to act in a certain way despite knowing the consequences.
Example: The defendant’s wilfulness in ignoring the court order led to further legal consequences.