primeval

Use primeval when you want to suggest something has existed from the beginning. The Big Bang? Dinosaur bones? Ancient trees? Yep — primeval.

The adjective primeval is from the Latin root words primus, meaning "first," and aevum, meaning "age." You might have an irrational, primeval fear of monsters — meaning that your monster fear has been there for as long as you can remember.

Definitions of primeval
1

adj having existed from the beginning; in an earliest or original stage or state

“the forest primeval
Synonyms:
aboriginal, primaeval, primal, primordial
early
at or near the beginning of a period of time or course of events or before the usual or expected time

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