life-limiting
US /ˈlaɪfˌlɪm.ɪ.tɪŋ/
UK /ˈlaɪfˌlɪm.ɪ.tɪŋ/

1.
describing a disease or condition that cannot be cured and that is expected to kill someone within a limited period of time
:
•
She was diagnosed with a life-limiting illness.
•
Palliative care is often provided to patients with life-limiting conditions.