| natural(adjective, characteristic, body, start, physical) |
| inborn(adjective, characteristic, start, reasonable, physical) |
| inherent(adjective, characteristic, body, start, reasonable) |
| intrinsic(adjective, characteristic, start, natural, fixed) |
| ingrained(adjective, characteristic, start, natural, individual) |
| native(adjective, characteristic, start, reasonable, common) |
| congenital(adjective, characteristic, start, reasonable, common) |
| intuitive(adjective, characteristic, reasonable, obscure, extraordinary) |
| organic(adjective, natural, basic, vital, live) |
| visceral(adjective, physical, natural, heart, emotional) |
| essential(adjective, characteristic, body, reasonable, material) |
| inbred(adjective, characteristic, start, natural, individual) |
| constitutional(adjective, characteristic, body, start, material) |
| deep-seated(adjective, characteristic, natural, fixed, emotional) |
| inherited(adjective, be, native, intrinsicality, hereditary) |
| instinctual(adjective, physical, natural, primitive, spontaneous) |
| hereditary(adjective, be, native, intrinsicality, inherited) |
| interior(adjective, heart, emotional, secret, private) |
| habitual(adjective, inside, instinctive, automatic, intuitive) |
| indigenous(adjective, start, natural, be, native) |