ծաւի

Etymology
Ačaṙean leaves the origin. He asks rhetorically, whether a connection with the North Caucasian word for “sky” is possible: compare 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬. Starostin and Nikolayev reconstruct 🇨🇬 for these. For the sense development “sky” → “sky-colored” → “blue” compare.

According to J̌ahukyan, this is perhaps an ablaut grade of, with a sense development “sea-colored” → “blue”. For such a development compare vs,  and the like.

Adjective

 * 1)  blue-eyed
 * 2)  pleasant blue