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union

In a sentence
Európska únia je skupina 27 krajin v Európe.
The European Union is a group of 27 countries in Europe.
Slovensko je členom Európskej únie.
Slovakia is a member of the European Union.
Únia schválila spoločné pravidlá pre obchod.
The union approved common rules for trade.
Obchodná únia zjednodušila výmenu tovaru.
The trade union simplified the exchange of goods.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Includes Tatoeba example sentences when present.
Full attribution on References.