Antonyms for energy

generated power:

peace, question.

person's spirit and vigor:

inactivity, cowardice, indolence, powerlessness, indifference, lifelessness, lethargy, uselessness, inefficiency, impotence, laziness, incompetence, lack, dispiritedness, tiredness, inability, idleness, weakness, apathy, dullness, ineffectiveness.

noun:

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