Separate adverbs are provided in this article. The words listed here are commonly found along with the verb separate in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb SEPARATE.
completely, easily
entirely, hardly
naturally, really
Hope this word list had the separate adverb you were looking for. In addition to adverbs used with separate, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.