| unconsequential(weak, feeble, tiny) |
| underfed(weak, feeble, tiny) |
| undeveloped(weak, feeble, deficient, incomplete, inexact) |
| unsound(weak, feeble, deficient, incomplete, inexact) |
| unsubstantial(weak, feeble, tiny) |
| valueless(adjective, mean, bad, poor, base) |
| weak(feeble, cheap, worthless, tiny, schlocky) |
| weakly(weak, feeble, tiny) |
| white elephant(expression, adjective, mean, bad, poor) |
| worse(mean, bad, lower, inferior, cheap) |
| wretched(mean, bad, lower, inferior, cheap) |
| zero(weak, feeble, tiny) |
| zilch(weak, feeble, tiny) |
| back seat(expression, lower, mediocre, substandard) |
| below par(expression, deficient, incomplete, inexact, warped) |
| bottom(lower, mediocre, substandard) |
| bottom-rung(lower, mediocre, substandard) |
| broken(deficient, incomplete, inexact, warped, defective) |
| chintzy |
| defective(deficient, incomplete, inexact, warped, flawed) |