IPA: /ˌæntəˌpɛnˈʌltɪmə/
KK: /æntəˌpɛnˈʌltɪmə/
The third-to-last syllable in a word.
In the word 'banana', the antepenultima is 'na'.
Antepenultima → It is formed from "ante-" (meaning before) and "paenultima" (from Latin "paenultimus", meaning second to last). The word refers to the third-to-last syllable in a word, literally meaning 'before the penultimate'.
Think of 'ante-' meaning 'before' and 'paenultima' meaning 'second to last' — this helps you remember that 'antepenultima' refers to the syllable that comes before the second to last.