This is the 2444th most frequent Spanish word.
portugal
Portugal: A country in southwestern Europe.
In this sentence, 'Portugal' is used as a proper noun referring to the country.
Portugal es un país que pertenece a la Unión Europea.
Portugal is a country that belongs to the European Union.
Here, 'Portugal' refers to a geographical location where someone resided.
Mi amigo vivió en Portugal durante tres años.
My friend lived in Portugal for three years.
In this usage, 'Portugal' is referenced to contextualize a cultural aspect related to the country.