This is the 9591st most frequent Russian word.
хвост
Tail.
Here, 'хвост' denotes a physical tail of an animal.
У кошки длинный хвост.
The cat has a long tail.
In this sentence, 'хвост' metaphorically represents a trail or something stretched out behind.
Машина ехала так быстро, что за ней тянулся пыльный хвост.
The car was moving so fast that a dusty trail stretched behind it.
Here, 'хвост' refers figuratively to the last position or the end of something.