This is the 5980th most frequent Russian word.
сидят
"Sit" or "are sitting" (third person plural).
The verb 'сидят' describes the physical action of sitting by a group of people.
Они сидят на скамейке в парке.
They are sitting on a bench in the park.
Here, 'сидят' emphasizes the state of being seated during an activity.
Ученики сидят в классе и слушают урок.
The students are sitting in the classroom and listening to the lesson.
In this instance, 'сидят' conveys both the physical act of sitting and the implicit feeling of anticipation.