unsoundness

affliction ailment confinement debilitation debility decay decrepitude defect deficiency delicacy disease disorder failing fault feebleness flimsiness flu fragility frailness frailty imperfection indisposition insubstantiality malady malaise puniness shortcoming unhealthiness unwellness vulnerability weakness

ailing delicateness diseasedness fragileness ill health sickliness unhealth unsubstantiality weakliness

ability advantage health improvement perfection soundness strength strong point