izazovom
Izazovom is the instrumental singular form of the noun izazov, which in Croatian, Serbian, and Bosnian means “challenge.” As a grammatical form, izazovom denotes instrumentality or means by which something is done, and it also appears in phrases that describe facing or dealing with a challenge. The base form is izazov (nominative), with izazovom as the instrumental singular and izazovima as the instrumental plural.
Etymology and form: izazov originates from the root zov (call) with the prefix iz-, conveying a sense
Usage: The instrumental form izazovom is used with prepositions such as s (with) to express instrumentality
See also: izazov, zov, izazwanie (related terms in the same language family). The concept of a challenge