Where does “pentasulphide” come from?

pentasulphide (English) comes from English penta-, from Ancient Greek πεντα-, from Ancient Greek πέντε, from Proto-Hellenic pénkʷe, from Proto-Indo-European pénkʷe — five.

pentasulphide (English): any sulphide containing five sulphur atoms in...

Definitions

any sulphide containing five sulphur atoms in...

Ancestry of “pentasulphide”, step by step

Step	Language	Word	Meaning
1	English	penta-	API; five
2	Ancient Greek	πεντα-	penta-, five; five
3	Ancient Greek	πέντε	five
4	Proto-Hellenic	pénkʷe	five
5	Proto-Indo-European	pénkʷe	five

Every word from Proto-Indo-European pénkʷe →