| laid-back(simple, honest, modest, straightforward, humble) |
| lowly(adjective, simple, honest, plain, modest) |
| meat and potatoes(expression, idiom, simple, straightforward, basic) |
| modest(simple, honest, humble, unaffected, self-effacing) |
| original(simple, straightforward, basic, fundamental, uncomplicated) |
| plain(simple, honest, modest, straightforward, humble) |
| prefatory(simple, straightforward, basic, fundamental, uncomplicated) |
| preliminary(simple, straightforward, basic, fundamental, uncomplicated) |
| primary(simple, straightforward, basic, uncomplicated) |
| primitive(simple, straightforward, basic, fundamental, uncomplicated) |
| primo(simple, straightforward, basic, fundamental, undemanding) |
| prosaic(simple, honest, modest, straightforward, humble) |
| rudimental(adjective, undemanding, realizable, elementary, primo) |
| rudimentary(simple, straightforward, basic, fundamental, uncomplicated) |
| simple(honest, modest, straightforward, humble, basic) |
| simplest(simple, straightforward, basic, fundamental, uncomplicated) |
| simplex(simple, straightforward, basic, fundamental, undemanding) |
| simplified(simple, straightforward, basic, fundamental, uncomplicated) |
| straightforward(simple, honest, modest, humble, basic) |
| substratal(simple, straightforward, basic, fundamental, undemanding) |