Penultimate came into English in the 17th century from the Latin word paenultimus, a combination of paene, meaning “almost,” and ultimus, meaning “last.” So if something’s penultimate, it’s “almost last”: more specifically, it’s next to last. If you’re reading a book with 20 chapters, chapter 19 is the penultimate chapter. If you’re a fan of grammar terms, you might already know that penultimate can refer to a word’s next to last syllable, called a penult.