This is the 1346th most frequent Turkish word.
olduk
"Olduk" means "we became" or "we were" in English.
In this sentence, 'olduk' is used in the meaning of 'became' to indicate a change of state, in this case 'becoming tired'.
Bugün çok hızlı alışveriş yaptık ve erkenden eve döndük, yorgun olduk.
Today we did shopping very quickly and returned home early, we became tired.
Here, 'olduk' expresses the state of 'being surprised', linking the emotion with its cause.
Siz bu kadar hızlı büyüdüğünüz için şaşkın olduk.
We are surprised because you grew up so quickly.
In this sentence, 'olduk' signifies the resulting emotion of 'happiness' due to certain actions or events.