antepenultimate (adj.)youdaoicibaDictYouDict
"the last but two," 1730, from antepenult (n.), 1610s, abbreviation of Latin antepaenultima (syllaba), fem. of antepaenultimus, from ante "before" (see ante) + paenultima, from paen "almost" + ultima "last" (see ultimate).
penultima (n.)youdaoicibaDictYouDict
1580s, from Latin penultima (syllaba), "the next to the last syllable of a word or verse," from fem. of Latin adjective penultimus "next-to-last," from paene "almost" + ultimus "final" (see ultimate).
penultimate (adj.)youdaoicibaDictYouDict
1670s, from penultima (n.) on model of proximate.
ultimate (adj.)youdaoicibaDictYouDict
1650s, from Late Latin ultimatus, past participle of ultimare "to be final, come to an end," from Latin ultimus (fem. ultima) "last, final, farthest, most distant, extreme," superlative of *ulter "beyond" (see ultra-). As a noun from 1680s. Ultimate Frisbee is attested by 1972.
ultimatum (n.)youdaoicibaDictYouDict
"final demand," 1731, from Modern Latin, from Medieval Latin ultimatum "a final statement," noun use of Latin adjective ultimatum "last possible, final," neuter of ultimatus (see ultimate). The Latin plural ultimata was used by the Romans as a noun, "what is farthest or most remote; the last, the end." In slang c. 1820s, ultimatum was used for "the buttocks."