hvisszaver
The term "hvisszaver" does not correspond to any known word or concept in common languages or established fields of study. It is possible that "hvisszaver" is a typographical error, a neologism, a proper noun from a specific, perhaps obscure, context, or a word from a language not widely documented. Without further information or clarification, it is impossible to provide a meaningful explanation or a wiki-style article.
If "hvisszaver" is intended to be a word from a specific language, providing the language of origin