costa

Of uncertain origin. The term is traditionally compared with Old Church Slavonic кость (kostĭ), though De Vaan rejects this etymology. Derksen, however, considers a relationship between this term and Proto-Slavic *kostь to be "quite possible." However, the connection is complicated if the Proto-Slavic term is derived from a pre-form *Host-, as such a term would not produce the Latin word. For this reason, De Vaan rejects the connection between the Slavic and Latin terms.