| modest(adjective, simple, clean, honest, plain) |
| motley(adjective, simple, easy, plain, modest) |
| naive(adjective, open, smooth, simple, easy) |
| nice(adjective, cool, kind, gentle, mild) |
| not complex(expression, adjective, clean, plain, pure) |
| off-the-cuff(adjective, simple, easy, plain, modest) |
| offhand |
| offhanded |
| open(adjective, simple, easy, plain, straightforward) |
| open and shut(expression, adjective, idiom, clean, plain) |
| primitive(simple, easy, real, genuine, unaffected) |
| prosaic(simple, honest, modest, humble, unaffected) |
| provincial(simple, easy, real, genuine, unaffected) |
| pure(adjective, simple, clean, plain, natural) |
| pure and simple(expression, adjective, idiom, clean, plain) |
| real(easy, genuine, unaffected, unpretentious, instinctive) |
| refreshing(adjective, cool, kind, gentle, mild) |
| relaxing |
| reposeful |
| roomy |