This is the 454th most frequent Italian word.
sorpresa
"Surprise."
In this sentence, 'sorpresa' is part of the phrase 'di sorpresa,' which indicates the state of being caught off guard.
Mi hai preso di sorpresa quando sei arrivato presto.
You caught me by surprise when you arrived early.
Here, 'sorpresa' qualifies the noun 'regalo,' indicating that the gift is unexpected and intended to surprise someone.
Ho comprato un regalo a sorpresa per il mio amico.
I bought a surprise gift for my friend.
Here, 'sorpresa' is used as a noun meaning 'surprise,' an event causing an unexpected or delightful emotion.