Grazie mille (Thanks a thousand) or Molte grazie (Many thanks).

Frequently said by shopkeepers or waiters when they approach your table. 3. Scusi vs. Scusa: The Formal Divide

Grazie, Prego, Scusi - song and lyrics by Dean Martin - Spotify

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Used when opening a door or letting someone pass in line.

"Prego" is the first-person singular of the verb pregare (to pray or to beg). The standard response to grazie .

The "e" at the end is always pronounced ( gra-tzee-eh ), never silent. 2. Prego: The Universal Responder