self-generated
spontaneous
animal
animalian
animalic
animalistic
atavistic
automatic
beastlike
beastly
bestial
blind
bodily
born
brutal
brute
brutelike
brutish
coeval
compulsive
conditioned
congenital
connatal
connate
connatural
constitutional
dumb
forced
genetic
gut
hereditary
immediate
impulsive
in the blood
inborn
inbred
incarnate
indigenous
ingrained
inherent
inherited
innate
instinctual
intestinal
intrinsic
intuitional
intuitive
habitual
involuntary
inward
irrational
mutual
natural
profound
unconscious
distinctive