Which phrase means to a great extent in German?

The phrase "weitgehend" translates to "to a great extent" in German. It is commonly used to indicate that something is extensive or covers a large area or scope. In various contexts, it captures the notion of being comprehensive or substantially reaching a level of significance.

On the other hand, "vollständig" means "complete" or "entire," which does not convey the nuance of extent. "Teilweise" translates to "partially," implying only a portion rather than a great extent. "Wesentlich" means "essential" or "significant," focusing on the importance rather than the degree. Thus, "weitgehend" is the most suitable choice for representing the idea of a great extent.