This is the 18443rd most frequent Russian word.
эстонского
"Эстонского" means "Estonian" (genitive or adjective form).
Here, the word "эстонского" is used as a possessive adjective in the genitive case to indicate association, specifying the language.
Я учу грамматику эстонского языка.
I am learning the grammar of the Estonian language.
In this example, "эстонского" is utilized as an adjective in the genitive case to describe a geographic characteristic, associating the city with Estonia.
Он из эстонского города Таллин.
He is from the Estonian city of Tallinn.
Here, "эстонского" acts as an adjective in the genitive case to indicate origin or cultural association with folklore, reflecting its connection to Estonia.