This is the 110th most frequent Russian word.
евро
The Russian word "евро" means "euro," the official currency of the Eurozone.
Here, 'евро' is used as a noun to denote a unit of currency (euro) and is in its base form, which remains unchanged irrespective of number.
Он купил новый телефон за двести евро.
He bought a new phone for two hundred euros.
Here, 'евро' is used to indicate the common currency used in certain countries, emphasizing its role as a standardized monetary unit.
В Шенгенской зоне большинство стран используют евро.
In the Schengen Zone, most countries use the euro.
In this sentence, 'евро' is again a noun referring to the currency, showing no plural change, which is a linguistic feature of the word 'евро'.