propreantepenult

[prō'prēăn'tĭpĕnʹŭlt, IPA: /ˌpɹəʊpɹiːˌæntɪˈpɛnʌlt/]
propreantepenult
(rare) The last syllable but four / the fifth syllable from last (of a word or other utterance); a word’s or other utterance’s propreantepenultimate syllable.