noun

the condition of being weak and delicate.

the increasing frailty of old age

infirmity,infirmness,weakness,weakliness,feebleness,enfeeblement,debility,incapacity,impairment,indisposition,fragility,delicacy,slightness,puniness,illness,sickness,sickliness,ill health,decrepitude,dodderiness,shakiness,weediness