Where does “sapius” come from?

sapius (Latin) comes from Latin sapere, from Latin sapio, from Proto-Italic sapiō, from Proto-Indo-European sh₁p-i-, from Proto-Indo-European sep- — to taste, to try out.

Ancestry of “sapius”, step by step

Step	Language	Word	Meaning
1	Latin	sapere	present active infinitive of sapiō; be wise, be...
2	Latin	sapio	I taste of, taste like, smack of, have a flavour...
3	Proto-Italic	sapiō	taste; discern, can tell apart, know
4	Proto-Indo-European	sh₁p-i-	to notice
5	Proto-Indo-European	sep-	to taste, to try out

Every word from Proto-Indo-European sep- →Every word from Proto-Indo-European sh₁p-i- →Every word from Proto-Italic sapiō →