The word "epiphylaxis" refers to the sudden onset of an allergic reaction. The spelling of the word can be explained using the International Phonetic Alphabet (IPA). The first syllable "epi-" is pronounced /ɛpɪ/, as in "epic". The second syllable "phylaxis" is pronounced /fəˈlæksɪs/, with stress on the second syllable and the "ph" pronounced as "f". This word can be challenging to spell and pronounce correctly, but it is crucial to know and understand for medical professionals and those affected by allergies.
Reinforcement of normal phylaxis; increase of the protective powers of the blood and other fluids.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.