This is the 11444th most frequent Turkish word.
ertelemişti
"Ertelemişti" means "had postponed."
The word 'ertelemişti' is used here to indicate that the teacher had delayed the planned date of the exam to a later time in the past.
Öğretmen sınavı bir hafta sonrasına ertelemişti.
The teacher had postponed the exam to a week later.
In this sentence, 'ertelemişti' signifies that the action of delaying the vacation happened before a reference time in the past, due to external circumstances.
Tatili hava durumundan dolayı ertelemişti.
He/She had postponed the vacation due to the weather conditions.
Here, 'ertelemişti' describes the completed action of moving the meeting to a later hour in the narrative's past.