Weakness, n.
1. The quality or state of being weak; want of strength or firmness; lack of vigor; want of resolution or of moral strength; feebleness.
2. That which is a mark of lack of strength or resolution; a fault; a defect. Many take pleasure in spreading abroad the weakness of an exalted character. Spectator.
Syn. -- Feebleness; debility; languor; imbecility; infirmness; infirmity; decrepitude; frailty; faintness.
Shades of meaning
Fernald lists weakness only as an antonym, under power.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given