Pestiferous in British English ADJECTIVE  informal troublesome; irritating breeding, carrying, or spreading infectious disease  corrupting; pernicious pestiferously (pesˈtiferously)  ADVERB pestiferousness (pesˈtiferousness)  from Latin pestifer, from pestis contagious disease, pest + ferre to bring   https://gogreenpestcontrol.ca/pestiferous-2022/ https://www.linkedin.com/pulse/pestiferous-2022-randy-bilesky/?published=t