| feeble(adjective, strong, weak, thin, degenerate) |
| chicken(adjective, weak, thin, delicate, shaky) |
| debilitated(adjective, weak, thin, delicate, shaky) |
| effete(adjective, weak, thin, delicate, degenerate) |
| etiolated(adjective, weak, thin, delicate, shaky) |
| faint(adjective, weak, thin, delicate, shaky) |
| flabby(adjective, weak, thin, delicate, shaky) |
| flaccid(enervated, senescent, irresilient) |
| impotent(adjective, weak, thin, delicate, shaky) |
| languid(adjective, weak, thin, delicate, shaky) |
| powerless(adjective, weak, thin, delicate, shaky) |
| sapless(adjective, weak, thin, delicate, degenerate) |
| weak(adjective, thin, incompetent, frail, puny) |
| weakly(adjective, weak, thin, delicate, shaky) |
| aged(adjective, weak, thin, delicate, shaky) |
| ailing(adjective, weak, thin, delicate, shaky) |
| anaemic |
| anemic |
| asthenic |
| bloodless |