Where does “latrina” come from?

latrina (Portuguese) comes from Latin latrina, from Latin lavātrīna, from Latin lavō, from Proto-Italic lawaō, from Proto-Indo-European léwh₃eti, from Proto-Indo-European lewh₃- — to wash.

latrina (Portuguese): latrine

Definitions

latrine

Ancestry of “latrina”, step by step

Step	Language	Word	Meaning
1	Latin	latrina	bath; lavatory, water closet, toilet, privy
2	Latin	lavātrīna	—
3	Latin	lavō	to wash, bathe
4	Proto-Italic	lawaō	—
5	Proto-Indo-European	léwh₃eti	—
6	Proto-Indo-European	lewh₃-	to wash

Every word from Proto-Indo-European lewh₃- →Every word from Proto-Indo-European léwh₃eti →Every word from Proto-Italic lawaō →