the.com/treatment
What you do to a problem, a patient, or a screenplay until it behaves.
means The way you handle, manage, or care for something or someone — medically, chemically, or just attentively.
from From Latin tractare, to handle or drag about, via French traitement; the same root that gives us tractor and intractable, all wrestling with stubborn things.
Hollywood senseA short prose sketch of a film before scripting.
Silent treatmentDocumented since 1844 as deliberate weaponized quiet.
Spa cousinSame word covers chemotherapy and cucumber facials.