IPA: //koʊˈiːtɜrnəl//
KK: /koʊˈiːtɜrnəl/
Existing at the same time as something else and lasting forever; having the same eternal nature.
The two concepts are coeternal, meaning they have always existed together.
Coeternal → It is formed from "co-" (meaning together) and "aeternus" (meaning eternal). The word "coeternal" means existing together for all eternity or having the same eternal nature.
Think of 'together' ('co-') and 'eternal' — this helps you remember that 'coeternal' refers to things that exist together eternally.