
Emaciation
Context Specificity
Use 'emaciation' in appropriate contexts, usually medical or situations involving extreme lack of food. 
Not Just Illness
'Emaciation' can also occur without illness, such as from malnutrition or purposeful dieting. 
Empathetic Language
'Emaciation' often evokes empathy or concern; use it to convey the gravity of someone's physical state. 