Where does “*vespertillum” come from?

*vespertillum (Vulgar Latin) comes from Latin vespertīliō, from Latin vesper, from Proto-Italic *wesperos, from Proto-Indo-European wek(ʷ)speros, from Proto-Indo-European we-.

Ancestry of “*vespertillum”, step by step

StepLanguageWordMeaning
1Latinvespertīliōa bat (animal)
2Latinvesperthe evening or vespers; supper, dinner; the...
3Proto-Italic*wesperos—
4Proto-Indo-Europeanwek(ʷ)sperosevening
5Proto-Indo-Europeanwe-—

Words derived from “*vespertillum”

Every word from Proto-Indo-European we- →Every word from Proto-Indo-European wek(ʷ)speros →Every word from Proto-Italic *wesperos →