Breakdown of Otobüs duraktan ayrılmak üzere.
otobüs
bus
durak
bus stop
ayrılmak
to leave (depart, separate)
üzere
about to / on the verge of
Questions & Answers about Otobüs duraktan ayrılmak üzere.
Why does durak take the -tan ending here?
The verb ayrılmak (to depart/leave) requires the ablative case (-DAn, meaning "from"). While in English you "leave the stop," in Turkish you leave from the stop. Because durak ends in a voiceless consonant (k), the d in the -dan suffix changes to t, giving us duraktan.
How does üzere mean "about to" here?
When the word üzere is placed directly after a verb in its infinitive form (ending in -mAk or -mEk), it creates the meaning of being "about to" or "on the verge of" doing something. Here, ayrılmak üzere simply means "about to leave."
Where is the word for "is" in this sentence?
It is implied. For the third-person singular (like "he", "she", "it", or "the bus"), the "to be" suffix is -dIr. While you could formally write ayrılmak üzeredir, this suffix is very often dropped in everyday Turkish, leaving just üzere at the end of the sentence.