tué-ùn底蘊

hidden ability

hidden ability, wisdom, background, tradition, culture, etc.; rich (cultural, historical) deposit; inside information; inside details; reality beneath the surface

English Wiktionary, “底蘊” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%BA%95%E8%98%8A · confidence: Medium (Wiktionary, Hokkien)