The primary accented syllable in the pronunciation of the medical word endocrinology (en-doh-krih-naw-loh-jee) is

naw

Explanation:

The primary accented syllable is a syllable that is focused most of all when the word is spoken. For example:  when we say Fatastic, the syllable that is focused most is tas.

If we see the syllables of endocrinology, there can be following few options for a primary syllable.

en-doh-krih-loh-jee: This is not most focused accented syllables, so these are not primary syllable.

naw: This is most focused syllable so this is  primary accented syllable.

Hope it help!

naw

Explanation:

The main stressed syllable is differentiated by being the strongest syllable in a word, that is, which we pronounce with the greatest intensity. It appears in different positions of the word. Depending on the position of this syllable, the word will have a classification, and it will depend on the intensity with which it is pronounced. In the word "endohkrihnawlohjee" the syllable that is spoken most strongly, is the syllable "naw", you may notice this by speaking the word aloud, or by trying to shout the word.

the awnser is d i think