쇠

Etymology
According to Fukui et al. (2017), this term might be related to 🇨🇬, as both share the sense of "key, lock" and the Pyongan dialectal form coincides with the orthodox Korean reading of.

Noun

 * 1) iron
 * 2) metal
 * 3) a tool made from iron like key, lock etc.

Noun

 * 1) metal