by birth

constitutionally genetically intrinsically naturally

congenitally immanently inseparably natively

commonly consistently easily generally instinctively normally simply spontaneously typically uniformly usually

artlessly but of course by nature candidly casually characteristically customarily freely genuinely habitually impulsively informally innocently openly ordinarily readily unaffectedly unpretentiously

difficultly unusually

affectedly unnaturally

basically formerly

primitively

at first at the outset at the start by origin first in the beginning in the first place incipiently primarily to begin with

secondarily