Where does “nutrix” come from?

nutrix (Latin) comes from Latin nūtriō, from Proto-Italic snoutrjō, from Proto-Indo-European snew-tr-ih₂, from Proto-Indo-European (s)neh₂- — to swim; to float.

Ancestry of “nutrix”, step by step

Step	Language	Word	Meaning
1	Latin	nūtriō	—
2	Proto-Italic	snoutrjō	—
3	Proto-Indo-European	snew-tr-ih₂	female nurser
4	Proto-Indo-European	(s)neh₂-	to swim; to float

Every word from Proto-Indo-European (s)neh₂- →

nutrix — Etymology, Origin & Word History | Etymology Explorer