This is the 17327th most frequent Russian word.
сюрприз
Surprise.
Here, 'сюрприз' is used as a noun in its singular form to describe an unexpected and delightful event or thing.
Этот подарок был приятным сюрпризом.
This present was a pleasant surprise.
In this sentence, 'сюрприз' again functions as a noun, indicating an upcoming surprise being planned for someone.
Мы готовим сюрприз для нашего друга.
We are preparing a surprise for our friend.
Here, 'сюрприз' is used as a noun in the genitive singular form ('сюрприза'), referring to the concept of an unexpected or unforeseen event.