蕴藏
yùn cáng · HSK 7
to contain
🏦⛏️ 蕴 hold-in-store + 藏 hide/store = reserves kept hidden away, like ore untapped underground
藏 — grass radical 艹 + 臧 (phonetic)
A semantic-phonetic compound. The grass radical 艹 on top suggests plants or vegetation used for concealment, while 臧 below provides the sound. Originally meant to hide or conceal something in the grass, later extended to mean 'store' or 'collect,' and when read 'zàng' it means a treasury or storehouse.