Antonyms for vigor

power, energy:

apathy, indolence, incompetence, lethargy, inertia, weakness, rest, immobility, inability, lifelessness, powerlessness, enervation, clumsiness, idleness, laziness, inactivity, repose, impotence, dullness.

noun:

incapacity, disablement, ineffectuality, inefficaciousness, impotency, paralysis, torpidity, inanition, puniness, sluggishness, slightness, incapableness, incapability, inaptitude, disability, helplessness, inefficacy, inability, uselessness, tenderness, ineffectiveness, softness, incompetence, ineffectualness, powerlessness, impotence, incompetency.