| simple(adjective, straightforward, basic, fundamental, uncomplicated) |
| elementary(adjective, simple, straightforward, basic, undemanding) |
| plain(simple, straightforward, basic, fundamental, uncomplicated) |
| uncomplicated(simple, straightforward, basic, fundamental) |
| unidirectional |
| easy(adjective, simple, straightforward, basic, fundamental) |
| hassle-free |
| homespun |
| single |
| unsophisticated |
| ABCs(simple, straightforward, basic, fundamental, undemanding) |
| abecedarian(simple, straightforward, basic, fundamental, uncomplicated) |
| bare |
| basal(simple, straightforward, basic, uncomplicated) |
| basic(simple, straightforward, uncomplicated) |
| beginning(simple, straightforward, basic, fundamental, uncomplicated) |
| clear(simple, straightforward, basic, fundamental, uncomplicated) |
| duck soup(expression, simple, straightforward, basic, fundamental) |
| elemental(simple, straightforward, basic, fundamental, uncomplicated) |
| essential(simple, straightforward, basic, fundamental, uncomplicated) |