Where does “estereofònic” come from?

estereofònic (Catalan) comes from Catalan estereo-, from Ancient Greek στερεο-, from Ancient Greek στερεός, from Proto-Indo-European ster- — sterile, infertile.

estereofònic (Catalan): stereophonic

Definitions

stereophonic

Ancestry of “estereofònic”, step by step

Step	Language	Word	Meaning
1	Catalan	estereo-	—
2	Ancient Greek	στερεο-	—
3	Ancient Greek	στερεός	firm, solid, rigid; standard, of full value;...
4	Proto-Indo-European	ster-	sterile, infertile

Every word from Proto-Indo-European ster- →Every word from Ancient Greek στερεός →Every word from Catalan estereo- →