This is the 4032nd most frequent Polish word.
węgry
"Hungary" (a country in Central Europe).
Here, 'Węgry' refers to the country Hungary, but the locative case 'Węgrzech' is used because the sentence indicates a location.
Byłem na Węgrzech podczas wakacji.
I was in Hungary during the holidays.
In this sentence, 'Węgry' refers to Hungary and is used in its base nominative form as the object of the verb 'visit'.
Chciałbym odwiedzić Węgry w przyszłym roku.
I would like to visit Hungary next year.
'Węgry' in this sentence is the subject of the sentence and denotes the country Hungary in the nominative case.