| invalid(adjective, weak, poor, inadequate, feeble) |
| languorous |
| sapless(adjective, weak, weakness, thin, delicate) |
| slack(adjective, still, lifeless, inactive, passive) |
| unqualified(adjective, weak, poor, skill, short) |
| weakly(adjective, weak, weakness, thin, delicate) |
| asthenic |
| childless(adjective, rich) |
| cold(adjective, cool, detached, unfriendly, stiff) |
| deficient(adjective, weak, poor, low, short) |
| dud(adjective, weak, unable, helpless, powerless) |
| fragile(adjective, weak, thin, delicate, shaky) |
| frustrated(adjective, arouse bad feelings) |
| indecisive(adjective, weak, thin, delicate, uncertain) |
| inexpert(adjective, weak, inadequate, feeble, incompetent) |
| invertebrate |
| irresolute(adjective, weak, uncertain, nervous, unstable) |
| jejune |
| lame(adjective, weak, poor, thin, delicate) |
| no go(expression, idiom, failure, inadequate, limited) |