Reconstruction:Proto-Slavic/kosatъ

Etymology 1
Formed as.

Adjective

 * 1) hairy
 * 2) having pigtail
 * 3) having sharp appendages
 * 1) having sharp appendages

Descendants

 * East Slavic:
 * South Slavic:
 * West Slavic:
 * Sorbian:
 * South Slavic:
 * West Slavic:
 * Sorbian:
 * West Slavic:
 * Sorbian:
 * West Slavic:
 * Sorbian:
 * Sorbian:

Etymology 2
Fossilized deadjectival noun from 🇨🇬.

Noun

 * 1) dorsal fin (of fish, sharks, or catacea)
 * → (by extension) cyprinid fish

Descendants

 * South Slavic:
 * косат (“cyprinid fish”)