This is the 2519th most frequent German word.
ukrainer
A "Ukrainer" in German refers to a "Ukrainian," meaning a person from Ukraine.
In this sentence, 'Ukrainer' is used as a noun to denote a male person from Ukraine.
Der Ukrainer lebt seit vielen Jahren in Deutschland.
The Ukrainian has been living in Germany for many years.
Here, 'Ukrainer' indicates plural usage, referring to people from Ukraine collectively.
Die Ukrainer arbeiten gemeinsam an dem Projekt.
The Ukrainians are working together on the project.
'Ukrainer' in this context specifies an individual colleague from Ukraine.