Here are some possibilities:
* Verb with dual meanings: A verb might have multiple meanings, depending on the context. For example, "run" can mean to move quickly on foot, or to operate a business. This is not a "dual verb" in a grammatical sense, but rather a verb with multiple meanings.
* Verb with two parts: Some verbs in English are made up of two parts, such as "break up," "look after," or "put off." These are called phrasal verbs, not dual verbs.
* Verbs in other languages: Some languages, like Russian, have grammatical categories that are different from English. They might have a concept similar to "dual verb" that relates to the number of objects or actions involved.
If you provide more context or information about where you encountered the term "dual verb," I can give you a more accurate answer.