This is the 5709th most frequent Russian word.
принятием
"Acceptance" or "adoption."
The word 'принятием' refers to the act of adopting or accepting the new law, used in an instrumental case.
Он был доволен принятием нового закона.
He was satisfied with the adoption of the new law.
Here, 'принятием' indicates the act of taking important decisions, used in an instrumental sense to describe the starting context of the project.
Проект начался с принятием важных решений.
The project began with the adoption of important decisions.
In this sentence, 'принятием' is used in the instrumental case to describe the improvement contingent upon adopting a specific policy.