primeval
/ˈpraɪmvɑːl/Definitions
1. adjective
relating to or existing from the earliest time; ancient
“The primeval forest had been untouched for centuries.”
2. noun
an ancient or original form of something
“The primeval soup is believed to have given rise to the first living organisms.”
3. noun
a period of time from the beginning to the present
“The company has been in existence for its entire primeval period, with the same management team.”