They have to watch the person they love not just deteriorate physically, but drift away emotionally.

After the revolution the street and many of its buildings continued to deteriorate physically, to such point that many collapsed and are still in a ruined state.

He deteriorated physically, suffered pains and had a cancer operated on.

All the trapped climbers deteriorated physically and mentally, lacking food, sleep, oxygen and, once the gas for the stoves ran out, the ability to melt snow and produce water.