| guileless(adjective, simple, honest, plain, natural) |
| misguided(adjective, ignorance) |
| unartificial(adjective, simple, clean, honest, plain) |
| undisciplined(adjective, new, raw, inept, unfamiliar) |
| unknowing(adjective, innocent, ignorant, naive, unfamiliar) |
| unpractised(noun, adjective, about person) |
| unprofessional |
| amateur(adjective, plain, new, raw, innocent) |
| childlike(adjective, simple, easy, honest, plain) |
| credulous(adjective, simple, easy, innocent, real) |
| frank(adjective, open, simple, easy, honest) |
| inartificial(adjective, open, simple, easy, real) |
| incompetent(inexpert, untrained, amateurish) |
| inefficient |
| jejune(simple, innocent, childlike, trusting) |
| know-nothing(ignorant, untaught) |
| lowbrow(ignorant, untaught) |
| misinformed(adjective, innocent, thick, unfamiliar, unconscious) |
| not taught |
| open(adjective, simple, easy, honest, plain) |