This is the 235th most frequent Finnish word.
eu
The Finnish word "eu" does not have a specific meaning on its own; it is typically part of other words, such as "EU," referring to the European Union.
Here, 'EU' is used as an acronym for the organization called the European Union.
EU on lyhenne sanoista Euroopan unioni.
EU is an abbreviation for the European Union.
In this context, 'EU:n' is in the possessive form of the acronym, showing that these rules pertain to members of the EU.
EU:n jäseniä koskevat erityiset tulliehdot.
Special customs rules apply to EU members.
Here, 'EU:sta' uses the elative case to indicate the topic of the discussion (about the EU).