This is the 10217th most frequent Turkish word.
beklendiklerini
"Their being expected" or "that they are expected."
In this sentence, 'beklendiklerini' is derived from the verb 'bekle-' (to expect/wait). It is in the passive form and indicates that the students are the ones who are expected.
Öğrenciler, toplantıda beklendiklerini biliyorlardı.
The students knew that they were expected at the meeting.
Here, 'beklendiklerini' again has a passive voice expressing that the personnel are being anticipated or waited for.
Yönetim, personelin belirtilen saatte beklendiklerini söyledi.
The management said that the personnel were expected at the specified time.
In this usage, 'beklendiklerini' denotes the guests understanding they are being awaited.