Answer: infirm

AnswerCrossword Clue
INFIRMNot feeling well
INFIRMFeeble
INFIRMAiling
INFIRMSickly
INFIRMWeak
INFIRMWeak and feeble
INFIRMLacking strength
INFIRMVacillating
INFIRMLacking bodily or muscular strength
infirmto weaken or the destroy the validity of / sickly (inclined to be ailing)
infirmfeeble; weak