| fundamental(adjective, beginning, opening, original, first) |
| generative(adjective, causative) |
| radical(adjective, cause) |
| rudimentary |
| basic(adjective, beginning, opening, original, first) |
| commencing(adjective, beginning, opening, original, first) |
| earliest(adjective, beginning, opening, original, first) |
| elementary(adjective, beginning, opening, original, first) |
| emerging(adjective, beginning, unfixed, promising, embryonic) |
| foremost(adjective, beginning, opening, original, first) |
| germ |
| imaginative |
| in embryo(expression, idiom, cause) |
| in ovo(expression, idiom, cause) |
| inaugural(adjective, beginning, opening, original, first) |
| inchoate(adjective, beginning, opening, original, first) |
| infant(adjective, beginning, opening, original, primary) |
| ingenious |
| introductory(adjective, beginning, opening, original, first) |
| maiden(adjective, beginning, opening, initial) |