Tiếng Việt · Word Attested

sở dĩ

[səː˧˩ zi˦ˀ˥] 🎙 Say it

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

Both English Tiếng Việt

Meaning · English

(conjunction) the reason why ... (is)

Nghĩa · Tiếng Việt

lý do tại sao

Machine-translated — suggest a fix

ConjunctionRegister: formal

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 ↗

Common questions

What does “sở dĩ” mean?

(conjunction) the reason why ... (is)

Is “sở dĩ” formal or informal?

sở dĩ is generally formal.

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