This is the 11880th most frequent Russian word.
заполнения
"Заполнения" means "filling" or "completion."
In this sentence, 'заполнения' is used as a noun in its genitive case, referring to the rules of completing or filling in forms.
Необходимо уточнить правила заполнения формуляра.
It is necessary to clarify form filling rules.
Here, 'заполнения' is used as a noun in the genitive case, describing the action of filling out the questionnaire.
Во время заполнения анкеты будьте внимательны.
During the filling out of the questionnaire, be attentive.
In this context, 'заполнения' acts as a noun in the genitive case to describe the process of filling in data.