| larval(simple, basic, fundamental, elementary) |
| meat and potatoes(expression, idiom, simple, straightforward, basic) |
| merest |
| original(adjective, simple, straightforward, basic, fundamental) |
| plain(simple, straightforward, basic, fundamental, uncomplicated) |
| prefatory(simple, straightforward, basic, fundamental, uncomplicated) |
| preliminary(simple, straightforward, basic, fundamental, uncomplicated) |
| primary(adjective, simple, straightforward, basic, fundamental) |
| primitive(adjective, simple, straightforward, basic, fundamental) |
| primo(simple, straightforward, basic, fundamental, uncomplicated) |
| simple(straightforward, basic, fundamental, uncomplicated, elementary) |
| simplex(simple, straightforward, basic, fundamental, uncomplicated) |
| simplified(simple, straightforward, basic, fundamental, uncomplicated) |
| straightforward(simple, basic, fundamental, uncomplicated) |
| substratal(simple, straightforward, basic, fundamental, uncomplicated) |
| uncompleted(simple, basic, fundamental, elementary) |
| uncomplex(simple, straightforward, basic, fundamental, uncomplicated) |
| uncomplicated(simple, straightforward, basic, fundamental) |
| underlying(adjective, simple, straightforward, basic, uncomplicated) |
| undeveloped(adjective, simple, basic, fundamental, elementary) |