| free and easy(expression, idiom) |
| gabby(adjective, sociable) |
| genuine(adjective, open, simple, easy, pure) |
| green(adjective, simple, clean, natural, straightforward) |
| guileless(adjective, simple, honest, natural, straightforward) |
| haymish |
| ignorant(simple, easy, real, genuine, unaffected) |
| improv(adjective, simple, easy, plain, modest) |
| impulsive(simple, easy, real, genuine, unaffected) |
| inartificial(simple, easy, real, genuine, unaffected) |
| inconspicuous(adjective, simple, easy, plain, modest) |
| ingenuous(adjective, open, simple, easy, clean) |
| innocent(adjective, open, smooth, simple, easy) |
| instinctive(simple, easy, real, unaffected) |
| intelligible(adjective, succinct) |
| interpersonal |
| irregular |
| laid-back(cool, simple, easy, honest, humble) |
| laid back(expression, adjective, simple, plain, straightforward) |
| low-key(adjective, simple, informal) |