| vital(adjective, top, important, significant, original) |
| critical(adjective, original, essential, fundamental, key) |
| implicit in(verb, expression, adjective, phrasal verb) |
| original(adjective, simple, plain, important, significant) |
| subjacent(adjective, lower, beneath) |
| ultimate(adjective, surface) |
| base(adjective, last, bottom) |
| based on |
| central(adjective, top, important, significant, original) |
| constitutional(adjective, important, significant, original, essential) |
| indispensable(adjective, important, significant, original, essential) |
| key(adjective, important, significant, original, essential) |
| latent(adjective, hidden, dormant) |
| main(adjective, top, original, essential, basic) |
| necessary(adjective, important, significant, original, essential) |
| primal |
| capital(adjective, essential, fundamental, key, main) |
| concealed(adjective, fundamental, latent) |
| covert |
| integral(adjective, important, significant, original, essential) |