The word "hypsistaphylia" is a rare and complex term used to describe a condition in which an individual experiences acute sensitivity to high altitudes. The word is pronounced as /hɪpsistəˈfɪliə/ with stress on the second syllable. The first syllable "hypsist(o)" refers to high altitude and the second syllable "staphylia" means palate. Together, the word "hypsistaphylia" describes the intensity of the symptoms experienced by an individual at high altitudes. It is worth noting that the spelling and pronunciation of this word may be difficult for many people to master.
A condition in which the palate is high and narrow.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.