The story
From laryngo- + tracheo- + broncho- + pneumonitis.
Etymology from Wiktionary, CC BY-SA 4.0.
laryngotracheobronchopneumonitis
Today it means: Inflammation of the larynx, trachea, bronchi, and lungs, typically caused by infection and involving multiple parts of the respiratory tract; often associated with severe forms of croup or related respiratory illnesses. Full definition →