Debilitant :: Debilitant (a.) Diminishing the energy of organs; reducing excitement; as, a debilitant drug..
Debilitate :: Debilitate (v. t.) To impair the strength of; to weaken; to enfeeble; as, to debilitate the body by intemperance..
Debilitation :: Debilitation (n.) The act or process of debilitating, or the condition of one who is debilitated; weakness..