Pronounced: FREE-mih-uhn, noun/adj
Notes: You can probably guess this one, but I was off too far to not include it
The word eonian means “something lasting an eon; eternal or everlasting”
This word showed up in the mid-1700s
Background / Comments
The word is the word eon with the adjectival form -ian added to it. The word eon comes from the Greek word aiṓnios (eternal).