natural hereditary inborn innate inbred inherent inherited constitutional native born connate connatural inbuilt ingrown instinctual original unlearned frequent genetic indigenous indwelling ingrained intrinsic latent organic unacquired instinctive essential intuitive immanent hardwired integral constitutive engrained fundamental basic ingrain primitive intuitional rooted involuntary gut elemental primeval spontaneous automatic primaeval untaught habitual visceral characteristic impulsive unthinking underlying primal accustomed regular normal typical central subjective inseparable primordial indelible permanent vital ineradicable radical mechanical unpremeditated animal reflex mechanic robotic unconscious unprompted quintessential genetical inheritable subconscious structural unmeditated natal emotional heritable distinctive ingenerate ineffaceable implicit inveterate intimate true elementary internal key core fixed necessary material indispensable