tsǹg鑽

to drill

to drill; to bore; to study intensively; to go deep into or go through; to get into; to break through; to pierce; to secure personal gain

English Wiktionary, “鑽” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E9%91%BD · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)