noxious

comparative more noxious · superlative most noxious · alternative obsolete noctious

1. Harmful; injurious.

   In the living state, the body is observed to […] reject what is noxious; [...]

   1822, John Barclay, chapter I, in An Inquiry Into the Opinions, Ancient and Modern, Concerning Life and Organization, Edinburgh; London: Bell & Bradfute; Waugh & Innes; G. & W. B. Whittaker, section I, page 1

   1 more example

   [...] many old sewers have been neglected and are in dire need of repair. If that repair does not come in time, the result is noxious and potentially hazardous.

   2014 June 14, “It's a gas”, in The Economist, volume 411, number 8891, archived from the original on 09 Jan 2025

2. Morally corrupting.

   1 more example

   Immediately upon joining, Ms. Yaccarino had her work cut out for her. Mr. Musk quickly made changes that tore up much of the good will Twitter had with users, employees and advertisers, including changing speech policies that allowed noxious content to circulate on the platform. Many advertisers left.

   2025 July 9, Mike Isaac, Kate Conger, “X CEO Linda Yaccarino Says She Is Leaving Elon Musk’s Platform”, in The New York Times, →ISSN, archived from the original on 09 Jul 2025

3. Very unpleasant.

   a noxious smell