Feeble, a. [Compar. Feebler; superl. Feeblest.]
Etymology: [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 strenght; 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.
1 other Webster entry under this spelling
Feeble, v. t.
To make feble; to enfeeble. [Obs.] Shall that victorious hand be feebled here Shak.
Shades of meaning
Fernald has no entry of its own for feeble; he lists it under faint.
Where he writes about it:
A person may be faint when physically wearied, or when overcome with fear; he may be a faint adherent because naturally feeble or purposeless, or because half-hearted in the cause; he may be a faltering supporter because naturally irresolute or because faint-hearted and timid in view of perils that threaten, a listless worker, through want of mental energy and purpose. — from faint