Standard Lemma guide

odourless

adj · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • UK: /ˈəʊdələs/
  • Southern-England: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Having no odour.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

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

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adjective

Meaning 2

having no odor

Definition source: Princeton WordNet 3.0

Examples

  • odorless gas
  • odorless flowers

Meaning relationships

Synonyms: odorless, inodorous

Antonyms: none provided

History

Etymology

Etymology tree English odour Proto-Indo-European *lewh1- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English odourless From odour + -less.