antepenultimate (adj.) Look up antepenultimate at Dictionary.com
"the last but two," 1730, from antepenult (n.), 1610s, abbreviation of Latin antepaenultima (syllaba) "last syllable but two in a word," from fem. of antepaenultimus, from ante "before" (see ante-) + paenultima, from paene "almost" (see penitence) + ultima "last" (see ultimate).