This is the 15844th most frequent Polish word.
tajnego
"Secret" or "confidential."
The word 'tajnego' describes the club as secret, conveying the idea of concealment or confidentiality.
W naszej szkole odbyło się spotkanie tajnego klubu.
In our school, a meeting of the secret club took place.
In this sentence, 'tajnego' characterizes the archive as secret, emphasizing its hidden or undisclosed nature.
Ujawniłem lokalizację tajnego archiwum.
I revealed the location of the secret archive.
Here, 'tajnego' modifies the document, indicating its confidential or restricted-access status.