This is the 14332nd most frequent Turkish word.
oldunuz
"Oldunuz" means "you became" or "you have become" in English.
In this context, 'oldunuz' is used as the past tense form of 'olmak' (to become), indicating a completed action and defining a transformation into a state (being a leader).
Harika bir lider oldunuz.
You became a wonderful leader.
Here, 'oldunuz' expresses having reached a state or condition in the past, emphasizing the acquired trait or characteristic (being knowledgeable).
Bu konuda çok bilgili oldunuz.
You have become very knowledgeable in this matter.
In this case, 'oldunuz' is used in a context referring to a state of being in relation to qualities or manners (being kind).