ún-thòng隱痛

secret or hidden anguish

secret or hidden anguish; secret suffering; dull ache; dull pain

English Wiktionary, “隱痛” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E9%9A%B1%E7%97%9B · confidence: Medium (Wiktionary, Hokkien)