The Vietnamese word "ngoan cố" is an adjective that translates to "stubborn," "obstinate," or "contumacious" in English. It describes someone who is unwilling to change their mind or behavior, even when faced with good reasons to do so.
Cô ấy rất ngoan cố và không chịu lắng nghe ý kiến của người khác.
(She is very stubborn and refuses to listen to other people's opinions.)
Anh ta ngoan cố đến mức không chấp nhận sai lầm của mình.
(He is so obstinate that he won't admit his mistakes.)
In more advanced contexts, "ngoan cố" can be used to describe not just individuals but also groups or organizations that refuse to adapt to change or reject new ideas.
The primary meaning of "ngoan cố" relates to stubbornness in a negative sense. However, in some contexts, it can describe a strong commitment to one's principles, though this is less common and can still carry a hint of negativity.