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Definition of Perniciously
1. Adverb. In a harmfully insidious manner. "These drugs act insidiously"
2. Adverb. In a noxiously baneful way. "This banefully poisoned climate"
Definition of Perniciously
1. Adverb. In a pernicious manner. ¹
¹ Source: wiktionary.com
Definition of Perniciously
1. [adv]