This is the 2461st most frequent Catalan word.
secret
A piece of information kept hidden or not shared with others.
In this sentence, 'secret' is used as a noun to denote confidential information shared with another person.
Vaig explicar el meu secret al meu millor amic.
I told my secret to my best friend.
Here, 'secret' also acts as a noun but emphasizes the act of keeping something confidential.
Conserva el secret amb cura, si us plau.
Keep the secret carefully, please.
In this instance, 'secret' functions as an adjective, describing something that is hidden or not commonly known.