This is the 291st most frequent Italian word.
parti
"Parti" in Italian means "parts" or "you leave/go" (second person singular of "partire").
In this sentence, 'parti' is the second person singular of the verb 'partire', meaning 'to leave'.
Tu parti domani per Parigi.
You leave for Paris tomorrow.
Here, 'parti' is a plural noun meaning 'parts'.
Queste parti del libro sono interessanti.
These parts of the book are interesting.
In this example, 'parti' as a plural noun refers to 'pieces' or 'parts' of the puzzle.