From Longman Dictionary of Contemporary Englishnoxiousnox‧ious /ˈnɒkʃəs $ ˈnɑːk-/ adjective formal HARM/BE BAD FORharmful or poisonous SYN toxic, → innocuous noxious fumes
Examples from the Corpus
noxious• It is a noxious and insidious notion that insults the intellectual abilities of black students.• Thus the dreadful smogs of pre-1952 have been eliminated and the emission of noxious and offensive gases limited.• The dumps were generating explosive gases and leaching noxious chemicals that polluted underground water sources.• Increasing tax on petrol would encourage people to drive smaller cars with fewer noxious emissions.• Residents have to put up with noxious fumes from the nearby factory.• Many edible species of butterfly gain protection by resembling noxious or poisonous species.• The normal gastric mucosa can prevent bypass diffusion of potentially noxious substances from the gastric lumen.• There needs to be renewed awareness of the capacity of the synthesizer and sampling to produce filthy, noxious tones.Origin noxious (1400-1500) Latin noxius, from noxa “harm” 