PRIMEVAL
aboriginal, primal, primeval, primaeval, primordial
(adjective) having existed from the beginning; in an earliest or original stage or state; “aboriginal forests”; “primal eras before the appearance of life on earth”; “the forest primeval”; “primordial matter”; “primordial forms of life”
Source: WordNet® 3.1
Etymology
Adjective
primeval (comparative more primeval, superlative most primeval)
belonging to the first ages
primary; original
primitive
Source: Wiktionary
Pri*me"val, a. Etym: [L. primaevus; primus first + aevum age. See
Prime, a., and Age.]
Definition: Belonging to the first ages; pristine; original; primitive;
primary; as, the primeval innocence of man. "This is the forest
primeval." Longfellow.
From chaos, and primeval darkness, came Light. Keats.
Source: Webster’s Unabridged Dictionary 1913 Edition