The primary accented syllable in the pronunciation of the medical word
ventriculoperitoneal (ven-trih-kyoo-loh-pair-ih-toh-nee-al) is trih.
Accented syllable are the ones which have full pronunciation of the
vowels present in it. On the other hand, unaccented syllable don't have
their vowel sounds fully pronounced.
In the example (ven-trih-kyoo-loh-pair-ih-toh-nee-al) the primary accented
syllable is trih as a result of the vowel sound being full pronounced.
Read more about Accented syllable here https://brainly.com/question/3606496