This is the 12628th most frequent Portuguese word.
trabalharam
"Trabalharam" means "they worked."
The word 'trabalharam' here is used as the action completed in the past referring to their effort for the project.
Eles trabalharam arduamente para completar o projeto.
They worked hard to complete the project.
In this context, 'trabalharam' describes the activity the children accomplished collaboratively in the past.
As crianças trabalharam juntas na tarefa de arte.
The children worked together on the art assignment.
Here, 'trabalharam' refers to the completed collective effort during the event.