This is the 8456th most frequent Russian word.
начало
"Начало" - "beginning" or "start."
Here 'начало' is also a noun signifying the concept of an origin or start, used in a thematic context.
На экзамене писали сочинение на тему начало цивилизации.
During the exam, we wrote an essay on the topic of the beginning of civilization.
In this sentence, 'начало' indicates the starting time or moment of an event.
Он с нетерпением ждал начало праздника.
He eagerly awaited the start of the celebration.
Used as a noun meaning 'beginning', referring to the start of something.