The spelling of the word "craniotrypesis" follows the rules of English phonetics. It can be broken down into syllables as "cra-nee-oh-trip-uh-sis". The first syllable "cra" is pronounced as "kræ" with a short "a" sound. The second syllable "nee" is pronounced as "ni" with a long "e" sound. The third syllable "oh" is pronounced as "oʊ" with a long "o" sound. The fourth syllable "trip" is pronounced as "trɪp" with a short "i" sound. The fifth syllable "uh" is pronounced as "ə" with a schwa sound. The final syllable "sis" is pronounced as "sɪs" with a short "i" sound.
Trephining of the skull.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.