This is the 6142nd most frequent Polish word.
armenii
"Armenii" in Polish means "Armenians" (the people of Armenia).
Here, 'Armenii' refers to Armenians as a group of people in the plural nominative case.
Armenii mieszkają w wielu krajach na świecie.
Armenians live in many countries around the world.
In this sentence, 'Armenii' is used in the plural locative case to indicate with whom the conversation took place.
Rozmawiałem z Armenii o ich kulturze.
I spoke with the Armenians about their culture.
Here, 'Armenii' refers to Armenia as a country in the locative case and not the people.