Dictionary

noxious en · ADJ

Pronunciation

• (Southern-England) audio
• /ˈnɒkʃəs/ (Received-Pronunciation)
• nŏk′shəs
• /ˈnɑkʃəs/ (General-American)

Etymology

From Latin noxius (“hurtful, injurious”), from noxa (“hurt, injury”), from nocere (“to hurt, injure”); see nocent.

Meanings

1. Harmful; injurious.
   • 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:
   • 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:
   • [...] 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:

Forms

Deriveds

noxiously · nonnoxious · noxiousness · noxious trade · unnoxious · noxious stimulus

Relateds

innocent · nocent · obnoxious

Synonyms

harmful · injurious · scathing

Translations (47)

ast dañible (harmful) · pl niezdrowy (harmful) · de Schad- (harmful) · pt nocivo (harmful) · eu kaltegarri (harmful) · ro nesănătos (harmful) · de schädlich (harmful) · fi vahingollinen (harmful) · fur nocîf (harmful) · fi haitallinen (harmful) · gl nocivo (harmful) · et kahjur- (harmful) · pt daninho (harmful) · gl daniño (harmful) · ru ядови́тый (harmful) · mi orotā (harmful) · fi myrkyllinen (harmful) · it malsano (harmful) · ro vătămător (harmful) · bg нездравословен (harmful) · hu kártékony (harmful) · vi độc hại (harmful) · co nucivu (harmful) · ru вре́дный (harmful) · sh ште̏тан (harmful) · eo venefna (harmful) · cs nezdravý (harmful) · bg вреден (harmful) · cs škodlivý (harmful) · cmn 有害的 (harmful) · es nocente (harmful) · fr nocif (harmful) · es nocivo (harmful) · ko 유해한 (harmful) · pl szkodliwy (harmful) · tr zararlı (harmful) · lv kaitīgs (harmful) · hu ártalmas (harmful) · ja 有毒な (harmful) · ro nociv (harmful) · ca nociu (harmful) · la noxius (harmful) · it nocivo (harmful) · sh štȅtan (harmful) · ast nocivu (harmful) · es nocible (harmful) · it insalubre (harmful)