infirm

Only a skeleton crew of volunteers and medical and municipal workers remain, along with residents too old, poor or infirm to leave.

Anne said her message to the White House was: "Please, please do everything you can to get him out. He's the oldest one there, and he's the most infirm. Please help us."

“We cannot be a strong or secure nation when our infrastructure, industry, society, and economy are infirm.”

Yurchenkove, like all the border villages, had only a few elderly or infirm civilians.

I thought, Was there no end to the indignities suffered by the weak and the infirm for the conveniences of the strong and the well-fed?