primal

英['praɪm(ə)l] 美['praɪml]

1. serving as an essential component;: "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"

2. 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"