Where does “*umbulicus” come from?

*umbulicus (Vulgar Latin) comes from Latin umbilīcus, from Proto-Indo-European *h₃nóbʰōl — navel.

Ancestry of “*umbulicus”, step by step

StepLanguageWordMeaning
1Latinumbilīcusa navel
2Proto-Indo-European*h₃nóbʰōlnavel
Every word from Proto-Indo-European *h₃nóbʰōl →Every word from Latin umbilīcus →