Jung argued that horror touches on primordial images in the collective unconscious.
By now a calm had settled over him, a kind of primordial survival instinct, he believes.
One predicted side effect of inflation is primordial gravitational waves: twisty ripples in the structure of the Universe.
primordial pri·mor·di·al (prī-môr'dē-əl)
Being or happening first in sequence of time; primary; original.
Belonging to or characteristic of the earliest stage of development of an organism or a part.
Relating to a primordium.