Reconstruction:Proto-Slavic/kosъ

Etymology 1
Per Derksen, probably from an earlier, related to 🇨🇬, , although the variation in the Greek forms suggests a pre-Greek substratum word.

Noun

 * 1)  blackbird

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Etymology 2
Continues (possibly, based on the doublet ), from  or depalatalized.

Adjective

 * 1) skew, slanted

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