Answer: rerum

AnswerCrossword Clue
RERUM

... primordial: the first beginnings of things.

RERUM

In ... natura (in the nature of things): Lat.

RERUM

... primordia (first beginnings of things): Lat.

RERUM
... primordia (first beginnings of things).
RERUM
... novarum
RERUM"De ... Natura," Lucretian opus