Where does “pentose” come from?

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

pentose (Portuguese): pentose

Definitions

pentose

Ancestry of “pentose”, step by step

Step	Language	Word	Meaning
1	Portuguese	penta-	penta
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 →Every word from Ancient Greek πεντα- →Every word from Proto-Hellenic pénkʷe →