This is the 11714th most frequent Russian word.
завершению
"Completion" or "conclusion."
In this sentence, 'завершению' is used in the dative case to indicate the approach towards completion.
Проект близится к завершению.
The project is nearing completion.
Here, 'завершению' is in the dative case and is part of the phrase expressing dedication toward the conclusion of a task.
Мы уделяем внимание завершению работ.
We are focusing on the completion of the work.
In this example, 'завершения' is used in the genitive case as it relates to the deadline for the completion of the project.