preantepenultima en · NOUN
Etymology
From pre- + ante- + penultima.
Meanings
-
The last syllable but three (of a word or other utterance); the fourth-to-last syllable.
[…] receiving the principal accent on the penultima, the word necessarily takes the secondary accent on the preantepenultima.
1825, Samuel Oliver, A General Critical Grammar of the Inglish Language, page 337: