The word "noxious" comes from the Latin word "noxa" meaning injury.
The word "noxious" means harmful or poisonous. In the context above, it suggests that the substance or entity being described is detrimental to health or well-being.
It is possible that you are thinking of the word noxious, meaning extremely bad or toxic.
The root word of "obnoxious" is "nox," which comes from Latin meaning "night."
The fumes from the factory were noxious and made it difficult to breathe.
No it is an adjective.
Noxious
skunk in Latin is mephitis meaning noxious vapour
Noxious weed is the umbrella name for a group of weeds that are hazardous to crops, humans and/or habitats. For a list of many of the plants that are classified as noxious weeds, please refer to the related link.
Words with the Latin root "noxa" meaning injury include "noxious," "innocuous," and "nocturne."
There are some noxious people who clutter up this service by posting their homework questions that they could very well figure out for themselves with a tiny bit of effort.
fragrance ; noxious ; ephemeral ; nuance ; pulchritudinous ; olfactory.