раковина

Etymology
Formed from. At least the secondary meaning cavity, flaw (if not the word itself) is borrowed from.

Noun

 * 1) shell exoskeleton of mollusca, typically snails, rapana, mussels
 * 2)  blister, cavity, blowhole, flaw (formed during the solidification of a melted material, e.g. metal, concrete)
 * 1)  blister, cavity, blowhole, flaw (formed during the solidification of a melted material, e.g. metal, concrete)

Etymology
. Per Vasmer, from (genitive ) +, from , from. Cognate with, from the same Latin source, and with 🇨🇬, 🇨🇬, , 🇨🇬, 🇨🇬.

Noun

 * 1) shell (hard calcareous external covering of mollusks)
 * 2)  pinna, auricle, helix (the external ear)
 * 3) sink, washbowl, basin, bowl
 * 4) vesicle
 * 5) bandstand
 * 6)  blister, cavity, bubble, flaw, blowhole