虚弱的
低能的
微弱的（feeble的最高级）

Feeble \Fee"ble\ (f[=e]"b'l), a. [Compar. {Feebler} (-bl[~e]r);
superl. {Feeblest} (-bl[e^]st).] [OE. feble, OF. feble,
flebe, floibe, floible, foible, F. faible, L. flebilis to be
wept over, lamentable, wretched, fr. flere to weep. Cf.
{Foible}.]
1. Deficient in physical strength; weak; infirm; debilitated.

Carried all the feeble of them upon asses. --2
Chron. xxviii.
15.

2. Wanting force, vigor, or efficiency in action or
expression; not full, loud, bright, strong, rapid, etc.;
faint; as, a feeble color; feeble motion. ``A lady's
feeble voice.'' --Shak.