gréckému
Gréckému is a form of the Greek language. Specifically, it is the dative singular masculine or neuter form of the adjective "grécky" (Greek). In the Greek language, adjectives change their endings to agree in gender, number, and case with the noun they modify. The dative case is often used to indicate the indirect object of a verb, the object of certain prepositions, or to show the means or manner by which something is done. Therefore, "gréckému" would be used in a sentence to describe something that is in a Greek manner, or for a Greek thing, or to a Greek person, depending on the grammatical context and the specific noun it is referring to. For instance, it might appear in a phrase like "hovoriť gréckému národu" (to speak to the Greek nation). Understanding these case endings is crucial for comprehending and correctly using the Greek language.