catalytic converter – A device with a catalyst for converting pollutant gases into less harmful ones. More…
allergen – Though allergens are not harmful themselves, when they are combined with certain antibodies, a reaction (i.e. the allergy) liberates substances that damage body cells and tissues. More…
intrigant – A person who plots something illicit or harmful. More…
nocuous – Meaning “harmful, noxious,” it is based on Latin nocere, “to hurt.” More…