σφαῖρα

Etymology
Connections with or  have been suggested, but the aspiration of σπ- to σφ- is unexplained and the semantic development is dubious. Nikolayev instead suggests derivation from a, from a putative ; compare 🇨🇬 and 🇨🇬 (a borrowing from 🇨🇬).

Noun

 * 1) ball, globe, sphere