This is the 2738th most frequent Russian word.
ермак
"Ermak" refers to Yermak Timofeyevich, a Cossack leader and explorer known for his role in the Russian conquest of Siberia.
Here, 'Ермак' refers to a historical figure, a name used to indicate a specific individual significant in Russian history.
Ермак был легендарным казачьим атаманом.
Yermak was a legendary Cossack ataman.
In this context, 'ермак' is used as a term for a specific type of warm clothing, indicating its utilitarian use.
Мой дед надевает ермак на долгие зимние прогулки.
My grandfather wears a yermak coat for long winter walks.
Here, 'Ермак' again refers to Yermak, the historical explorer whose expeditions are central to parts of Russian history.