The concept of "more unclassifiable" is rather ambiguous, and the search for its antonyms can be somewhat challenging. However, we can approach the task by exploring antonyms for some of the words that make up the phrase. For "more," we can consider "less," "fewer," or "diminished." For "unclassifiable," we can use antonyms like "classifiable," "categorizable," or "sortable." Synthesizing these antonyms, we can suggest phrases such as "less categorizable," "fewer sortable," or "diminished classifiable" as possible antonyms for "more unclassifiable." Nonetheless, context plays a vital role in determining the appropriate antonyms for specific contexts, and consulting a thesaurus can also provide valuable insights.