| underived(adjective, rough, important, significant, fresh) |
| vital(adjective, important, significant, original, essential) |
| absolute(adjective, basic, fundamental, key, central) |
| bottom line(expression, important, significant, essential, basic) |
| capital(adjective, essential, fundamental, key, principal) |
| chief(adjective, essential, fundamental, key, principal) |
| concealed(adjective, original, basic, fundamental, primary) |
| critical(adjective, original, essential, basic, fundamental) |
| deep(original, basic, primary) |
| grassroots(adjective, important, significant, essential, basic) |
| hidden(adjective, original, basic, fundamental, primary) |
| inchoate |
| latent(adjective, original, basic, fundamental, primary) |
| lurking(adjective, original, basic, fundamental, primary) |
| name of game(expression, adjective, idiom, absolute, key) |
| needful(adjective, original, basic, fundamental, primary) |
| nitty gritty(expression, adjective, basic, absolute, fundamental) |
| nubber(adjective, basic, absolute, fundamental, key) |
| root(adjective, original, basic, fundamental, primary) |
| rooter(adjective, basic, fundamental, latent, underlying) |