| incapacitated(adjective, weak, inadequate, incompetent, inept) |
| incompetent(adjective, weak, inadequate, inept, helpless) |
| ineffective(adjective, weak, inadequate, incompetent, inept) |
| inept(adjective, weak, inadequate, incompetent, helpless) |
| infirm(adjective, weak, inadequate, incompetent, inept) |
| inoperative |
| invalid(enervated, senescent, irresilient) |
| irresilient(enervated, senescent) |
| laid low(expression, enervated, senescent, irresilient) |
| nerveless(adjective, weak, inadequate, incompetent, inept) |
| not fruitful(expression, adjective, useless, wasted, unsuccessful) |
| not young(expression, enervated, senescent, irresilient) |
| null |
| old(enervated, senescent, irresilient) |
| oldish(enervated, senescent, irresilient) |
| on the ropes(expression, idiom, enervated, senescent, irresilient) |
| out of condition(expression, idiom, enervated, senescent, irresilient) |
| out of gas(expression, idiom, enervated, senescent, irresilient) |
| out of shape(expression, idiom, enervated, senescent, irresilient) |
| over the hill(expression, idiom, enervated, senescent, irresilient) |