1) Antepenultimate 2) Second syllable from the last 3) Syllable 4) Third last syllable 
• (n.) Alt. of Antepenultima
An`te·pe'nult 
[n] - the 3rd syllable of a word counting back from the end
antepenult The third from the last syllable of a word; such as, the antepenult is stressed in the word 'superfluous' or in the word 'antediluvian'. It may also be considered the syllable of a word that precedes the penult.
antepenultima noun the 3rd syllable of a word counting back from the end
the third syllable from the end in a word, as te in antepenult.