nội bất xuất, ngoại bất nhập
In real, traceable use. Part of the curated seed collection; community review is coming.
Sense 1
Meaning · English
nothing inside can come out, nothing outside can come in
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Sources & notes
Imported from Wiktionary (CC BY-SA 4.0, retrieved 2026-07-29); community review pending. source ↗
Sense 2
Meaning · English
the place in question is sealed shut or heavily guarded
Common questions
What does “nội bất xuất, ngoại bất nhập” mean?
nothing inside can come out, nothing outside can come in
Is “nội bất xuất, ngoại bất nhập” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.