Where does “piato” come from?

piato (Italian) comes from Latin placitum, from Latin placitus, from Latin placeō.

Ancestry of “piato”, step by step

Step	Language	Word	Meaning
1	Latin	placitum	opinion, teaching, theory; decree, sentence,...
2	Latin	placitus	pleasing, agreeable, acceptable, agreed upon
3	Latin	placeō	—

piato — Etymology, Origin & Word History | Etymology Explorer