Pronunciation: [ˈə͡ʊdələs] (IPA) 
The word "odourless" is spelled with a "u" in the middle, rather than an "o", which may be confusing to some. However, the reason for this spelling is due to the word's root: "odour". The spelling of "odour" comes from its Latin origin and the "u" is retained in derivatives such as "odourless". The IPA phonetic transcription for "odourless" is /'əʊdələs/, with the stress on the first syllable.
Odourless is an adjective that describes something that lacks any discernible smell or fragrance. It refers to a neutral, non-aromatic state in which there is an absence or complete lack of odour. When an object, substance, or environment is odourless, it does not emit any identifiable or distinguishable scent. Odourlessness can relate to any form of matter, ranging from solids and liquids to gases or atmospheres.
The term is often used to describe substances or products that have been specially processed or treated to remove or neutralize any scent. Odourless substances are generally considered to be clean, fresh, and free from any unpleasant or intrusive smells. This characteristic is highly valued in various industries and applications, such as fragrance-free products for individuals with sensitivities or allergies.
The state of being odourless can be achieved through different methods, including chemical processes, filtration, or deodorization techniques. It is important to note that odourless does not imply tastelessness or absence of chemical composition, but rather solely refers to the absence of smell. This quality can be utilized advantageously, such as in certain food preparation where the sensory experience depends on taste rather than scent.
Overall, odourless signifies the lack of any detectable odor or fragrance, providing a neutral and inconspicuous sensory experience in relation to smell.
Destitute of odour.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
