This is the 959th most frequent Ukrainian word.
працювали
"Працювали" means "worked" in English.
The word 'працювали' here is used interrogatively, asking about a past action involving work.
Ви коли-небудь працювали в цьому офісі?
Have you ever worked in this office?
Here, 'працювали' is used as the plural past tense of the verb 'працювати', meaning 'to work', indicating completed action.
Вони працювали в полі цілий день.
They worked in the field all day.
In this context, 'працювали' again represents a plural past action, showing engagement in an activity, specifically working on a project.