thành thử
[tʰajŋ̟˨˩ tʰɨ˧˩]
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
(conjunction) this is the reason that, this is why, and so
Conjunction
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
[…] thành-thử cái xấu, cái dở của mình, thì vị tất đã bỏ đi được,[…][…] which is the reason why the ugly and the bad in us is not automatically done away with, […]
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 “thành thử” mean?
(conjunction) this is the reason that, this is why, and so
Is “thành thử” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.