ancillary Antonyms

signal propaedeutic prominent procreative principal primordial primogenial primary primal prime prevalent prevailing pressing prerequisite prepotent protrusile quintessential serious seminal self-reliant salient sacred ruling respected requisite required reigning regulative regnant ranking radical preponderant prepollent outstanding olea obligatory numerative numerary notable nonacid nodal needed necessitous necessary more momentous meridional overbearing overmost premier