民俗
mínsú · HSK 7
folklore
🏮 民俗 = 民 folk/people + 俗 custom = folk customs, folklore
民 means the common people; 俗 means custom or convention. Put them together and you get the customs of the people: folklore and folkways. The same 俗 shows up in 习俗 (custom) and 风俗 (local customs).
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.