bí ẩn
[ʔɓi˧˦ ʔən˧˩]
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
(adjective) secret; mysterious
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
‘Theo lệ thường[,] […] sự việc càng kì dị thì lại càng ít bí ẩn.[…]
Bà con đừng trông mong gì họ tin vào những chuyện kỳ lạ hay bí ẩn, đơn giản là vì họ chẳng hơi đâu bận tâm đến mấy trò vớ vẩn đó.They were the last people you'd expect to be involved in anything strange or mysterious, because they just didn't hold with such nonsense.
Wiktionary example (CC BY-SA 4.0)
Sources & notes
Imported from Wiktionary (CC BY-SA 4.0, retrieved 2026-07-29); community review pending. source ↗
Sense 2
Meaning · English
(noun) mystery; enigma
Common questions
What does “bí ẩn” mean?
(adjective) secret; mysterious
Is “bí ẩn” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.