"Buona sera!" (4)
I believe the answer is:
ciao
(Other definitions for ciao that I've seen before include "Hello and goodbye to the Italians" , "Buongiorno o arrivederci" , "Italian hello-goodbye" , "European's greeting" , "parting word" .)
I believe the answer is:
ciao
(Other definitions for ciao that I've seen before include "Hello and goodbye to the Italians" , "Buongiorno o arrivederci" , "Italian hello-goodbye" , "European's greeting" , "parting word" .)