Definition of antepenult in English:

antepenult

noun

Linguistics
  • The last syllable but two in a word, e.g. -ul- in antepenultimate.

    • ‘Stress is placed on the penult if it is long and on the antepenult if the penult is short.’
    • ‘If the word's ultima is short, the accent will recede to the antepenult and it will always be an acute accent.’
    • ‘The ultima is long, and therefore the antepenult cannot be accented.’
    • ‘The antepenult may be accented only if U is short and may receive only the acute.’
    • ‘Take a Latin word like attribuitis: the accent falls on the antepenult.’

Pronunciation:

antepenult

/ˌantɪpɪˈnʌlt/