IPA: /ˌsɛmpɪˈtɜrnɪti/
KK: /sɛmpɪˈtɜrnɪti/
A state of existence that continues indefinitely into the future, often used to describe a concept of time that is never-ending.
The idea of sempiternity suggests that some things may last forever in time.
Sempiternity is formed from "semper" (meaning always) and "aeternus" (meaning eternal). The word refers to the concept of something that is always eternal or everlasting.
Think of 'always' ('semper') and 'eternal' ('aeternus') to remember that sempiternity means a state of being that lasts forever.