trước khi
[t͡ɕɨək̚˧˦ xi˧˧]
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
(preposition) before (earlier than in time), prior to
Preposition
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
Trước khi ngủ phải chà răng nghe chưa.You ought to brush your teeth before going to bed.
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 “trước khi” mean?
(preposition) before (earlier than in time), prior to
Is “trước khi” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.