primordial
primordial; fundamental
Origin: From Latin primordialis, from primordium (beginning), from primus (first) + ordiri (to begin).
Also means
paramount
Usage Note
Primordial describes something of the greatest importance or belonging to the earliest origins — instinto primordial (primordial instinct), de importancia primordial (of paramount importance). It does not change for gender (el objetivo primordial, la cuestión primordial) but adds -es in the plural. It is a formal, often academic or journalistic word.
Examples
"La seguridad es de importancia primordial aquí."
Natural Translation
Safety is of paramount importance here.

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