This is the 14153rd most frequent Turkish word.
müdürlüğünü
"Directorate" or "the state of being a director/manager" (possessive form).
Here, 'müdürlüğünü' translates to 'the directorship of' and is part of the phrase 'Okul müdürlüğünü', meaning 'the school directorship'.
Okul müdürlüğünü titizlikle yürütüyor.
She is diligently carrying out the school directorship.
In this sentence, 'müdürlüğünü' is used to mean 'the directorship of' and specifies 'genel müdürlüğünü' or 'general directorship' in context.
O, şirketin genel müdürlüğünü devraldı.
He took over the general directorship of the company.
Here, 'müdürlüğünü' indicates 'the directorship of' with 'bölümün' specifying 'the department's directorship'.