линза

Etymology
in 1870s (earlier attested once in 1847 with the sense 'lentiform shape'), from, from , likely a borrowing from an unidentified source.

Compare 🇨🇬, 🇨🇬, and 🇨🇬 sounding too similar for a coincidence, however different enough to prohibit reconstruction of a common PIE protoform.

If ultimately a non-IE loanword, locating the source is virtually impossible because cultivation of lentil was widespread in the region since the Neolithic.

Noun

 * 1) lens object focusing or defocusing the light passing through it