This is the 1446th most frequent Russian word.
идут
"(They) go" or "(they) are going."
Here, 'идут' is used in its literal sense, describing the physical action of walking.
Они идут домой после работы.
They are going home after work.
In this sentence, 'идут' is used metaphorically to indicate the progress or development of something.
Дела идут хорошо.
Things are going well.
Here, 'идут' refers to the functioning or operation of the clock.