Preferred adverbs are provided in this article. The words listed here are commonly found along with the verb preferred in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb PREFERRED.
actually, apparently, certainly, clearly, commonly, consequently, consistently, currently
decidedly, definitely, deliberately, especially, evidently, finally, frequently, generally
greatly, highly, increasingly, infinitely, initially, invariably, justly, mostly
naturally, normally, obviously, openly, overwhelmingly, personally, probably, really
rightly, secretly, simply, strongly, traditionally, typically, uniformly, universally
usually, vastly, wisely
Hope this word list had the preferred adverb you were looking for. In addition to adverbs used with preferred, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.