: at the beginning, before anyone or anything else
n.: No. 1, as the first point, primacy, the primary/secondary/tertiary industry (the service sector), first and foremost, the first [second] violin, the first (1st), primarily, at the head, in the first place, most important
v.: start with
adj.: primary, imprimis
adv.: firstly, First, chiefly
pref.: the First R-
Thesaurus
begin prime, be the first to (do), chiefly foremost, First, front, basically, mostly, belike Chiefly Neighborhood, sequence uni- Community chiefly Residential areas, Chiefly Neighborhood Diyi Subdistrict Diyi Village