Synonyms of noxious in English:
the discharge of noxious effluents into streams and rivers noxious fumes
very unpleasant, nasty, disgusting, awful, dreadful, horrible, terrible, vile, revolting, foul, sickening, nauseating, nauseous, appalling, offensive, foul-smelling, evil-smelling, malodorous, fetid, putrid, rancid, unwholesome, unhealthy, insalubrious
Northern Irish informal bogging
literary noisome, mephitic
[Antonyms] innocuous, safe, pleasant
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