Tiếng Việt · Word Attested

tại sao

[taːj˧˨ʔ saːw˧˧] 🎙 Say it

In real, traceable use. Part of the curated seed collection; community review is coming.

Both English Tiếng Việt

Meaning · English

(adverb) why

Nghĩa · Tiếng Việt

tại sao

Machine-translated — suggest a fix

Adverb

Where it’s used: Used Toàn quốc & hải ngoại · Vietnam-wide & diaspora

Tại sao mày làm vậy?Why did you do that?

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 “tại sao” mean?

(adverb) why

Is “tại sao” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.

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