This is the 959th most frequent Ukrainian word.
працювали
"Працювали" means "worked" in English.
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.
Ми працювали над проектом ввечері.
We worked on the project in the evening.
The word 'працювали' here is used interrogatively, asking about a past action involving work.