This is the 511th most frequent Czech word.
ukrajinských
"Of Ukrainian" or "Ukrainian" (possessive/plural form).
The word 'ukrajinských' is used here as an adjective in the genitive plural form to describe 'odborníků' (experts), indicating they originate from Ukraine.
Na konferenci zdůraznili potřebu ukrajinských odborníků.
At the conference, they emphasized the need for Ukrainian experts.
'Ukrajinských' serves as a descriptive adjective in the genitive plural form, modifying 'pracovníků' (workers) to specify their nationality.
Do České republiky přichází mnoho ukrajinských pracovníků.
Many Ukrainian workers are coming to the Czech Republic.
Here, 'ukrajinských' is an attributive adjective in the genitive plural form, closely associated with 'komunit' (communities), implying the communities belong to or are associated with Ukraine.