odourless

O1D2O1U1R1L1E1S1S1
UK/ˈəʊdələs/

adjective

Having no odour.

“They were taken unawares and overcome when the room filled with a lethal, odourless gas.”

Similar
odorlessinodorousnon-aromaticscentless
OriginProto-Germanic *lausaz ← Proto-Indo-European *lewHs- ← English odour →
UncommonScrabble 10
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Meanings

adjectiveodourless (not comparable)

alternative US odorless

  1. not comparableHaving no odour.

    They were taken unawares and overcome when the room filled with a lethal, odourless gas.

    1 more example

    Smiling, young, muscular, paunchless, probably odourless, he went.

    1958, Anthony Burgess, The Enemy in the Blanket (The Malayan Trilogy), published 1972, page 357

Synonyms & antonyms

adjectivehaving no odor

Similar
odorlessinodorousnon-aromaticscentless
Also see
inodorousnon-aromaticodorlessscentless

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Englishodour
  2. Proto-Indo-European*lewh₁-
  3. Proto-Indo-European*lewHs-
  4. Proto-Germanic*leusaną
  5. Proto-Germanic*lausaz
  6. Englishodourless

From odour + -less.

Full word history & related roots →
Cite this entry
APA

odourless. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/odourless

MLA

“odourless.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/odourless. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “odourless,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/odourless.

Source: odourless on Wiktionary, CC BY-SA 4.0.