lạc hậu
[laːk̚˧˨ʔ həw˧˨ʔ]
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
(adjective) backward; underdeveloped
Adjective
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
Lạc hậu là điều khó tránh một khi chí tiến thủ đã không còn.Being outdated would be a fact that's hard to avoid when the will of self-improvement is abandoned.
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 ↗
Common questions
What does “lạc hậu” mean?
(adjective) backward; underdeveloped
Is “lạc hậu” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.