From Wiktionary, the free dictionary
Reflexive of көс (kös, “to move (change residence)”).
көһүн • (köhün)
- (intransitive) to appear, to become visible
- Synonyms: баар буол (baar buol), бык (bık)
- to be found, detected, opened
- көстүү (köstüü, “detection, discovery”)