| rudimentary(adjective, simple, important, straightforward, basic) |
| ultimate(adjective, essential, basic, surface, fundamental) |
| basal(adjective, body, simple, plain, material) |
| deep-seated(adjective, characteristic, original, essential, basic) |
| inbred(adjective, characteristic, start, complete, essential) |
| constitutional(adjective, characteristic, body, start, material) |
| gut(adjective, intimate, secret, private, penetrating) |
| indwelling(adjective, start, complete, essential, basic) |
| deep(adjective, original, essential, basic, intimate) |
| foundational(adjective, simple, pure, important, straightforward) |
| natural(adjective, characteristic, start, complete, material) |
| original(adjective, simple, important, natural, straightforward) |
| profound(adjective, intimate, secret, private, penetrating) |
| radical(adjective, important, significant, original, essential) |
| abecedarian(adjective, simple, straightforward, basic, fundamental) |
| atomic(adjective, simple, pure, whole, united) |
| beginning(simple, straightforward, basic, fundamental, uncomplicated) |
| cardinal(adjective, important, significant, original, essential) |
| central(adjective, important, significant, original, essential) |
| chief(adjective, essential, fundamental, key, principal) |