verbírni

I’m not finding a widely recognized topic called "verbírni" in common references. Could you clarify what you mean by this term? For example, is it an Icelandic linguistic concept, a term from a specific field or publication, or a fictional/constructed concept? If you provide context or a source, I can draft a concise, neutral wiki-style article (under 300 words). If you’d rather, I can also create a stub for a hypothetical linguistic process involving verbs.