(comparative more pestiferously, superlative most pestiferously)
pestiferous + -ly
"pestiferously." YourDictionary, n.d. Web. 16 November 2018. <https://www.yourdictionary.com/pestiferously>.
pestiferously. (n.d.). Retrieved November 16th, 2018, from https://www.yourdictionary.com/pestiferously
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