This is the 1277th most frequent Russian word.
правительством
The word "правительством" in English means "government" (instrumental case).
'правительством' is used in the instrumental case, indicating with whom the collaboration is happening.
Мы сотрудничаем с правительством в этом проекте.
We are collaborating with the government on this project.
Here, 'правительством' is in the instrumental case to show the actor who performed the action.
Этот закон был принят правительством.
This law was enacted by the government.
In this sentence, 'правительством' is used in the instrumental case to indicate the party discussing the issues.