This is the 16893rd most frequent Russian word.
соглашением
"Agreement."
Here 'соглашением' refers to the specific context of a formal document or pact that establishes terms of cooperation.
Мы подписали договор с соглашением о сотрудничестве.
We signed a contract with an agreement on collaboration.
In this sentence, 'соглашением' denotes the mutual understanding or consent that parties involved come to under an agreement.
Любые изменения в проекте должны быть утверждены соглашением сторон.
Any changes to the project must be approved by the agreement of the parties.
Here 'соглашением' reflects the formal accord between two entities, emphasizing the formalized mutual decision.