머툰ᄂᆞᄅᆞ

Etymology
The second element is, but the first element is. It appears to be the realis adnominal form, with modulator present, of the verb or adjective, but no such word is known in Middle Korean or any modern dialect. Alternatively, may be a single morpheme, although it is still undecipherable.

Proper noun

 * 1) a ford across the lower  near Pyongyang