Perish adverbs are provided in this article. The words listed here are commonly found along with the verb perish in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb PERISH.
actually, annually, assuredly, certainly, entirely
eternally, eventually, everlastingly, finally, frequently
immediately, inevitably, infallibly, miserably, necessarily
prematurely, probably, quickly, speedily, surely
ultimately, usually, utterly, wholly
Hope this word list had the perish adverb you were looking for. In addition to adverbs used with perish, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.