cviením
Cviením is not a standard orthographic form in Czech or Slovak; it is typically a misspelling or misrendering of the instrumental form cvičením. In standard Czech and Slovak, cvičením denotes the instrumental singular of the noun cvičení (Czech) or cvičenie (Slovak), meaning training, exercise, or practice.
Cvičením expresses means or method, roughly translating to “by training” or “through practice.” It is used to
Cvičení/cvičenie refers to the act or process of training or practicing. The instrumental form cvičením is used
Both languages derive cvičení/cvičenie from the verb cvičit (to train, to exercise). The instrumental form cvičením