surprise
The word 'sorpresa' in Italian is used to express a feeling of unexpectedness or astonishment, similar to the English word 'surprise'. It can be used as a noun, as in 'a big surprise', or as an exclamation, as in 'what a surprise!'
The surprise party for Maria was a great success.
This sentence is about an event, specifically a surprise party for someone named Maria. The surprise is that Maria did not know about the party, which was a success.
Children like to play the surprise game.
This sentence relates to a children's game, presumably a game which involves a surprise element. The suspense or unexpected element of the game is what the children find enjoyable.
I bought a surprise gift for your birthday.
The speaker in this sentence is telling someone that they have bought them a surprise gift for their birthday, meaning the recipient does not know what the gift is.