Synonyms : harmful, injurious
Noxious Sentence : Stay away from the noxious fumes of that solution.
Under The Lens : Noxious and Obnoxious
Etymologically noxious is related to hurt and to slaughter. Don’t confuse it with obnoxious. Noxious means injurious to physical or mental health while obnoxious means very offensive or objectionable. Ex – Noxious snakes were killing everyone in that obnoxious film.
Sentence: Stay away from the noxious fumes of that solution.