| unforced(adjective, simple, natural, casual, impulsive) |
| unintentional(adjective, simple, natural, casual, impulsive) |
| unplanned(adjective, simple, natural, casual, impulsive) |
| unpremediated(adjective, simple, natural, casual, impulsive) |
| unprompted(adjective, simple, natural, casual, impulsive) |
| unrestrained(adjective, artless) |
| unskillful(adjective, skilled, inept, unskilled) |
| unstudied(adjective, simple, honest, plain, natural) |
| up front(expression, adjective, simple, honest, plain) |
| voluntary(adjective, simple, natural, casual, impulsive) |
| willing(adjective, simple, natural, casual, impulsive) |
| amateurish(adjective, awkward, inept, clumsy, unskilled) |
| awkward(adjective, inept, clumsy, unskilled) |
| childlike(adjective, honest, plain, innocent, artless) |
| clumsy(adjective, awkward, inept, unskilled) |
| gauche(adjective, awkward, inept, clumsy, unskilled) |
| gawky(inept, unskilled) |
| green(adjective, honest, plain, innocent, artless) |
| guileless(adjective, honest, plain, innocent, artless) |
| gullible(innocent, artless, unworldly) |