sinn-san生鉎

to rust

to rust; to get rusty; to corrode; to oxidise; to accumulate grime on one's skin

English Wiktionary, “生鉎” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%94%9F%E9%89%8E · confidence: High (Wiktionary, PH/Quanzhou/Jinjiang)