primeval
Definitions
Of or relating to the earliest ages in the history of the world.
Existing from or dating to a very early time; ancient or primitive.
Examples
The dense jungle felt like a remnant of a primeval world untouched by modern civilization.
Deep within the cave, the explorers discovered paintings that dated back to primeval times.
A sense of primeval fear gripped him as he heard the howl of a predator in the dark forest.
Synonyms
ancient primordial pristine earliest archaic prehistoric original