Where does “iarnphirít” come from?

iarnphirít (Irish) comes from Irish pirít, from Old French pyrite, from Latin pȳritēs, from Ancient Greek πῡρίτης λίθος, from Ancient Greek πῦρ, from Proto-Hellenic *pāwər.

iarnphirít (Irish): pyrite

Definitions

pyrite

Ancestry of “iarnphirít”, step by step

Step	Language	Word	Meaning
1	Irish	pirít	pyrite
2	Old French	pyrite	—
3	Latin	pȳritēs	pyrite
4	Ancient Greek	πῡρίτης λίθος	stone of fire, flint
5	Ancient Greek	πῦρ	a fire; lightning; a fever
6	Proto-Hellenic	*pāwər	—

Every word from Proto-Hellenic *pāwər →Every word from Ancient Greek πῦρ →Every word from Ancient Greek πῡρίτης λίθος →