Proto-IE: *k'ēy(w)-, *k'yē(w)-
Meaning: grey
Tokharian: ? B kwele ( < *kiwo-lo-) 'black, dark grey' (Adams 239)
Old Indian: śyāvá- `dark-brown, brown, dark'; śyāmá- `black, dark blue or brown or grey or green' (with -y- on analogy with śyāvá-); śārá- `variegated'
Avestan: syāva- 'schwarz'; sāma- 'schwarz'
Old Greek: kīrró- `rotgelb, gelbbraun'
Latin: caerulus, caeruleus `tief-, dunkelblau, ultramarin'
Celtic: Ir cīar (< *kei̯ro-) `dunkel'
Russ. meaning: серый, сивый
References: WP I 360 f, 420; Buck 67.
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