| unadulterated(adjective, simple, pure, natural, straightforward) |
| unartificial(adjective, simple, pure, natural, straightforward) |
| under(adjective, light, slight, low, inferior) |
| undersized(low, inferior, insignificant, minor, smaller) |
| unequipped(adjective, inadequate, useless, unfit, unqualified) |
| unfit(adjective, inadequate, useless, unqualified, inept) |
| unfitted(adjective, inadequate, useless, unqualified, inept) |
| unhandy(inadequate, useless, inept, unable, unskilled) |
| uninitiated(inadequate, useless, inept, unable, unskilled) |
| unproductive(weak, poor, insufficient, scarce) |
| unprofessional(adjective, substandard, inexpert, untrained) |
| unproficient(inadequate, useless, inept, unable, unskilled) |
| unqualified(adjective, weak, poor, low, short) |
| unsatisfactory |
| unskilled(adjective, inadequate, useless, unqualified, inept) |
| unsophisticated(adjective, simple, natural, naive, unworldly) |
| untrained(adjective, inadequate, useless, unqualified, inept) |
| untutored(adjective, simple, pure, natural, straightforward) |
| useless(inadequate, inept, unable, unskilled, unskillful) |
| wanting |