antepenult, antepenultimate stress: The antepenult is the third-from-the-last syllable in a word (the one that precedes the penult). Antepenultimate stress is stress that falls on the antepenult. For example, the word "happiness" has antepenultimate stress (háppiness), while the related word "happy" has penultimate stress (háppy). See also: ultima, ultimate stress. [Spanish: antepenúltimo, esdrújulo]