This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The state of being weak or feeble; infirmity.

n. A state of physical or mental weakness.

n. The state of being weak; weakness; feebleness; languor.

n. The state of being weak or feeble; feebleness; lack of strength or vigor.

n. Specifically In medicine, that condition of the body, or of any of its organs, in which the vital functions are discharged with less than normal vigor, the amount of power and activity displayed being reduced.

n. In astrology, a weakness of a planet, due to its position: the reverse of a dignity.

n. the state of being weak in health or body (especially from old age)

"It should be added, that a temporary quantity of strength or debility may be induced by the defect or excess of stimulus above what is natural; and that in the same fever _debility always exists during the cold fit, though strength does not always exist during the hot fit."

softness    unfitness   

debilitation    debilitate    debile   

cachexy    wasting    cachexia    asthenia    astheny   

infirmity    imbecility    weakness    feebleness    languor   

ability    acceptability    adaptability    admissibility    affordability    agility    amiability    applicability    availability    capability   

infirmity    indigestion    derangement    drowsiness    faintness    prostration    lassitude    malaise    irritability    neurasthenia