1. (adv.) In the original time, or in an original manner; primarily; from the beginning or origin; not by derivation, or imitation.

2. (adv.) At first; at the origin; at the time of formation or construction; as, a book originally written by another hand.

ab initio ab ovo aborigine at first at the start before everything by birth by nature chiefly congenitally first first and foremost first thing firstly from the beginning genetically immanently in the beginning initially innately internally intrinsically inwardly mainly naturally primally primarily primitively primo principally