yuē约agreeddìng定decidedsú俗customchéng成become
Established by common practice; conventional.
Literal meaning
agreed (约) — decided (定) — custom (俗) — become (成)
Origin
A classical four-character phrase describing a custom or practice that has become established through common usage and agreement.
Examples
Zhè这zhǒng种shuō说fǎ法yǐ已jīng经yuē约dìng定sú俗chéng成le了。
This way of saying it has become conventional.
Zài在mǒu某xiē些wén文huà化zhōng中，sòng送lǐ礼wù物shí时yào要yòng用shuāng双shǒu手shì是yuē约dìng定sú俗chéng成de的lǐ礼yí仪。
In some cultures, it is conventional etiquette to use both hands when giving a gift.
Usage & nuances
Used to describe customs, practices, or expressions that have become accepted and established over time.
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