This is the 7109th most frequent Polish word.
it
The Polish word "it" does not exist; "it" is an English pronoun.
Here, 'to' acts as a demonstrative pronoun, equivalent to 'it' or 'this' in English, used to identify a specific object.
To jest mój ulubiony kubek.
This is my favorite mug.
In this sentence, 'ono' acts as a personal pronoun referring to a neuter singular subject, showing gender agreement.
Czekam, aż ono nadejdzie.
I am waiting for it to arrive.
The word 'tego' functions as the accusative form of 'it', indicating the object of the action of the verb 'find'.