Where does “prepenultimate” come from?

prepenultimate (English) comes from English pre, from Latin prae, from Proto-Italic prai, from Proto-Indo-European preh₂-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “prepenultimate”, step by step

prepenultimate traces back through two separate lines of ancestry.

via English pre

StepLanguageWordMeaning
1EnglishpreBefore; Precum, Cowper's fluid, pre-ejaculate; To...
2Latinpraebefore; in front; in front of
3Proto-Italicpraibefore; in front of
4Proto-Indo-Europeanpreh₂-before, in front
5Proto-Indo-Europeanper-before, in front; first; to go through
6Proto-Indo-Europeanpr̥tóspassed , crossed

via English penultimate

StepLanguageWordMeaning
1EnglishpenultimateNext to last, second to last; immediately...
2English-atehaving the specified thing; characterized by the...
3Latin-ātused
4Proto-Italic-ātos
5Proto-Indo-European-éh₂tosForms adjectives from nouns, indicating the possession of a thing or a quality
Every word from Proto-Indo-European pr̥tós