This is the 5946th most frequent Russian word.
свержения
"Свержения" means "overthrow" or "toppling" in English.
Here, the word 'свержение' (overthrow) is used as a general noun to describe the act of overthrowing something, in this case, a government.
Свержение старого правительства было неожиданным.
The overthrow of the old government was unexpected.
In this sentence, 'свержением' is the instrumental case form of the noun to describe circumstances or actions related to the overthrow.
В истории страны было множество событий, связанных со свержением различных режимов.
In the country's history, there were many events related to the overthrow of various regimes.
Lastly, 'свержению' is in the dative case, reflecting the intent or preparation directed towards the act of overthrowing.