Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
next-to-last is an adjective meaning "second last". It carries 2 recorded senses.
second last
“the author inadvertently reveals the murderer in the penultimate chapter”
“the figures in the next-to-last column”
used of the third or next to final year in United States high school or college
“the junior class”
“a third-year student”
Definitions, synonyms and semantic relations for next-to-last come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.