An Italian farewell meaning goodbye, literally 'until we see each other again.'
From Italian 'arrivederla' or 'arrivederci,' from 'a riveder' (literally 'to see again') plus 'la' (feminine you). It combines 'a' (to), 'riveder' (see again), and the object pronoun.
This word became famous in English through 1960s songs and movies about Italy—it's more hopeful than 'goodbye' because it assumes you'll meet again, which is why Italian culture embraced it as the perfect farewell.
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