| inartificial(adjective, open, simple, easy, real) |
| involuntary(adjective, simple, natural, casual, impulsive) |
| unartificial(adjective, simple, clean, honest, plain) |
| unconstrained(adjective, simple, natural, casual, impulsive) |
| unexamined |
| unexplored(adjective, neglect) |
| unintentional(adjective, simple, natural, casual, impulsive) |
| unsearched |
| untutored(adjective, simple, slow, stupid, natural) |
| extemporized(adjective, spontaneous, unprepared, unplanned, unrehearsed) |
| frank(adjective, open, easy, honest, plain) |
| free and easy(expression, adjective, idiom, relaxed) |
| honest(adjective, plain, natural, straightforward, innocent) |
| impulsive(adjective, open, simple, easy, natural) |
| inadvertent |
| off the cuff(expression, adjective, idiom, free, impromptu) |
| straightforward(adjective, open, simple, easy, honest) |
| unarranged(adjective, spontaneous, unprepared, unplanned, unrehearsed) |
| uncalculated |
| unconsidered |