俗
sú · HSK 7
popular
👥 俗 = 亻person + 谷 valley — the common folk of the valleys, hence custom and popular
The person radical 亻beside 谷 valley points to ordinary people living in the valleys; their shared habits become 俗, the customs and conventions of the common crowd. Sound sú rhymes with do.
俗 — person radical 亻 + valley 谷
A semantic-phonetic compound: 亻 (person) gives the meaning and 谷 (gǔ/valley) suggests the sound. Originally referred to the customs and habits of common people living in the valleys, later extending to mean 'common,' 'vulgar,' or 'secular' as opposed to refined or religious.