Where does “squalo nutrice” come from?

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

squalo nutrice (Italian): nurse shark

Definitions

nurse shark

Ancestry of “squalo nutrice”, step by step

squalo nutrice traces back through two separate lines of ancestry.

via Italian nutrice

Step	Language	Word	Meaning
1	Italian	nutrice	wet nurse
2	Latin	nutrix	wet nurse, nurse
3	Latin	nutrio	I suckle, breastfeed, nurse
4	Proto-Italic	snoutrjō	—
5	Proto-Indo-European	snew-tr-ih₂	female nurser
6	Proto-Indo-European	(s)neh₂-	to swim; to float

via Italian squalo

Step	Language	Word	Meaning
1	Italian	squalo	shark
2	Latin	squalus	a kind of sea fish, thought to be a shark;...
3	Proto-Indo-European	(s)kʷálos	large fish; sheatfish

Every word from Proto-Indo-European (s)neh₂- →Every word from Proto-Indo-European snew-tr-ih₂ →Every word from Proto-Italic snoutrjō →