This is the 14183rd most frequent Turkish word.
müsteşarı
The Turkish word "müsteşarı" translates to "undersecretary" in English.
Here, 'müsteşarı' is in the accusative form and refers to the undersecretary whom Mr. Mehmet visits.
Mehmet Bey müsteşarı sıkça ziyaret eder.
Mr. Mehmet frequently visits the undersecretary.
In this sentence, 'müsteşarı' is in the possessive form indicating the relationship to the ministry.
Bakanlık müsteşarı çok deneyimli bir kişidir.
The ministry's undersecretary is a very experienced person.
Here, 'müsteşarı' is used with a descriptive adjective and indicates the specific undersecretary being referred to.