How Do You Spell ENDOGNATHION?
Pronunciation: [ˌɛndə͡ʊɡnˈaθi͡ən] (IPA) 
Endognathion is a term used in anatomy, referring to the internal or medial surface of the lower jawbone, which contains the muscle attachments for chewing. The word is derived from Greek roots: endo meaning "internal or within", gnathos meaning "jaw", and -ion indicating a diminutive. The correct pronunciation of endognathion is /ɛn.doʊˈnæθ.i.ən/ (en-doh-nath-ee-uhn), with the emphasis on the "do" syllable. The word's spelling reflects the unique combination of Greek roots and English word-building conventions.
