一成不变
yī chéng bù biàn
In real, traceable use. Part of the curated seed collection; community review is coming.
Traditional: 一成不變
Fixed once and for all; never changing. Mostly used in the negative or as criticism: nothing stays the same for ever, a dull routine, a method that never adapts.
Đã hình thành thì không bao giờ thay đổi; cố định, cứng nhắc. Thường dùng trong câu phủ định hoặc với ý chê: không có gì là mãi mãi không đổi, nếp sống đơn điệu, cách làm không chịu đổi mới.
Register: neutral
Examples
Editorial example (illustrative, not a corpus attestation) — awaiting a native-speaker check
Sources & notes
Hán-Việt bridge batch 062 (2026-11-13). Headword, Traditional form and pinyin checked against CC-CEDICT (CC BY-SA 4.0) source ↗ · Hán-Việt reading: Unihan kVietnamese source ↗ ; en.wiktionary Vietnamese entries via kaikki.org extract, snapshot 2026-07-31 (CC BY-SA 4.0): etymology of “nhất thành bất biến” = 一成不變 · Vietnamese cognate: Idiomer entry “nhất thành bất biến” (nhat-thanh-bat-bien). Definition, literal gloss and example sentence are original; the example has not had a native-speaker check yet.
Equivalents & related
Common questions
What does “一成不变” mean?
Fixed once and for all; never changing. Mostly used in the negative or as criticism: nothing stays the same for ever, a dull routine, a method that never adapts. Literally: once formed, never changing
Is “一成不变” formal or informal?
一成不变 is generally neutral.