FreeVocabulary
Noxious
/ˈnɑːkʃəs/ adjective mediumHarmful or poisonous, especially describing a substance or fume that damages health.
The factory released a noxious cloud of smoke that forced nearby residents to shut their windows.
Memory Trick
Think of the 'nox' hiding inside the word, the same root found in 'toxic' — noxious fumes are basically toxic air.