WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / P / pernicious pernicious adjective /pərnɪʃəs/ 3 syllables 10 letters Scrabble 14 WWF 18 Definitions adjective working or spreading in a hidden and usually injurious way insidioussubtle adjective exceedingly harmful banefuldeadlypestilent Look “pernicious” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →