约定俗成

約定俗成

yuēdìngsúchéng

idiom HSK 7 #64,791

Meanings

Yǔyán de hěnduō guīzé dōu shì yuēdìngsúchéng de.

Many rules of language are established by convention.

Zhège shuōfǎ suīrán bù tài zhǔnquè, dàn yǐjīng yuēdìngsúchéng le.

Although this expression isn't very precise, it has become accepted through common usage.

memory

约定 (to agree upon) + 俗 (custom) + 成 (to become) — something that becomes established through customary agreement.

约 yuē

定 dìng

俗 sú

成 chéng