IPA: /iˈoʊniən/
KK: /iˈoʊniən/
Lasting for an extremely long time, often forever or for an indefinite period.
The aeonian beauty of the ancient mountains captivated all who beheld them.
Aeonian is derived from the Greek word "aion" (meaning age or eternity) combined with the suffix "-an" (meaning pertaining to). The term "aeonian" refers to something that is eternal or everlasting, relating to an age or epoch.
Think of 'aion' meaning age or eternity, and remember that 'aeonian' describes something that pertains to an eternal age.