Syllable before the last

• Next-to-last syllable
• Word's next-to-last syllable
• Last but one
• Next to the last syllable of a word
• The next to last syllable in a word

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Penult \Pe"nult\, n. [Abbreviated fr. penultima.] (Gram. & Pros.) The last syllable but one of a word; the syllable preceding the final one.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"last but one," 1530s, abbreviation of penultima . As a noun from 1570s.

Wikipedia Word definitions in Wikipedia
A penult is a linguistics term for the second to last syllable of a word. It is an abbreviation of penultimate , which means the next to the last item in a series. The most common use of the word is in linguistics , where the word "penult" usually means ...

Wiktionary Word definitions in Wiktionary
n. 1 The next-to-last syllable of a word. 2 The next to the last in a series.