in·firm 
/ɪnˈfɚm/ adjective
/ɪnˈfɚm/ adjective [more infirm; most infirm] : having a condition of weakness or illness that usually lasts for a long time and is caused especially by old age
▪ The clinic provides free care for elderly and infirm people who lack health insurance. ▪ mentally and physically infirm
▪ The clinic provides free care for elderly and infirm people who lack health insurance. ▪ mentally and physically infirm
the infirm
: people who are weak, ill, etc. : infirm people
▪ providing care for the elderly and the infirm
▪ providing care for the elderly and the infirm
