This is the 707th most frequent Russian word.
заявлении
"Заявлении" means "statement" or "application" in English, depending on the context.
The word "заявление" is used here to mean a formal application or request, typically written for a specific purpose.
Он написал заявление о приёме на работу.
He wrote an application for employment.
The word "заявление" in this context refers to an official statement or announcement given by an authority or individual.
Согласно заявлению полиции, инцидент расследуется.
According to the statement by the police, the incident is under investigation.
Here, "заявление" denotes a spoken or written remark, typically of some importance, that someone wishes to keep private.