| delicate(adjective, weak, ill, sick, feeble) |
| dilapidated(adjective, feeble, frail, flimsy, debilitated) |
| effete(adjective, feeble, age, enervated, dilapidated) |
| enfeebled(adjective, weak, delicate, ill, sick) |
| failing(adjective, weak, delicate, ill, sick) |
| faint(adjective, weak, delicate, ill, sick) |
| faltering(adjective, weak, delicate, ill, sick) |
| flimsy(adjective, weak, delicate, ill, sick) |
| fossilized |
| fragile(adjective, weak, delicate, ill, sick) |
| frail(adjective, weak, delicate, ill, sick) |
| gerontic |
| gray |
| gray-headed |
| grey |
| haggard(adjective, feeble, dilapidated, debilitated, deteriorated) |
| halting(adjective, weak, delicate, ill, sick) |
| hoar |
| impotent(adjective, enervated, senescent, irresilient) |
| incapacitated(adjective, feeble, frail, flimsy, debilitated) |