This is the 1607th most frequent Russian word.
украинская
"Ukrainian" (adjective form).
Here, 'украинская' is an adjective describing the noun 'кухня' (cuisine) to specify its origin related to Ukraine.
Украинская кухня славится своим богатым вкусом и разнообразием блюд.
Ukrainian cuisine is famous for its rich taste and variety of dishes.
In this sentence, 'украинская' is used as an adjective to detail the origin or thematic focus of the noun 'книга' (book) indicating it relates to Ukraine.
Это украинская книга о национальной культуре и традициях.
This is a Ukrainian book about national culture and traditions.
Here, 'украинская' functions as an adjective to attribute the team ('команда') with its nationality or affiliation to Ukraine.