This is the 13675th most frequent Turkish word.
kuyruk
"Tail" or "queue/line."
Here, 'kuyruk' refers to the physical tail of an animal, which is common usage in describing animal anatomy.
Kedinin uzun ve tüylü bir kuyruğu vardır.
The cat has a long and furry tail.
In this case, 'kuyruk' is used metaphorically to refer to a line or queue of people waiting for something.
Market çıkışında insanlar uzun bir kuyruk oluşturmuştu.
At the market exit, people had formed a long queue.
Here, 'kuyruk' is used to indicate the end or rear part of something, in this instance, the airfield.