primordial

: existing at or from the beginning of time; primeval.
: (especially of a state or quality) basic and fundamental.
: (of a cell, part, or tissue) in the earliest stage of development.

Synonyms
:
native, aboriginal, local, ancient, initial, indigenous, autochthonous, intuitive, inborn, inherent, natural
Antonyms
:
modern, adventitious, expatriate, migrant

Etymology
:
primordius [LATIN] original
primordialis [latin]
primordium [english]