érkezéshez
érkezéshez is a Hungarian word. It is the dative case of the word "érkezés," which means arrival. The dative case in Hungarian is typically used to indicate the indirect object of a verb, or to express the recipient of an action or the purpose for which something is done. Therefore, "érkezéshez" translates to "to the arrival" or "for the arrival."
This form would be used in sentences where one might say, for example, "felkészülünk az érkezéshez" which