airless

airless — adjective

1. describing a room or other indoor space where the air feels heavy and stale, wit

1.adjectiveC1
Definition

describing a room or other indoor space where the air feels heavy and stale, with no breeze coming in, so it is uncomfortable to stay there for long.

Example

The small attic room was hot and airless, so Viraj opened the window for some breeze.

predicative use after linking verb: 'be airless'

We sat through the meeting in an airless conference room without any working fan.

attributive: 'airless + room/space noun'

Common collocations
  • hot and airless
  • stuffy and airless
  • dark and airless
  • cramped and airless
  • an airless room
  • an airless office
  • an airless basement
Synonyms
  • stuffy

    the most common everyday word; airless sounds slightly more formal or literary

  • stifling

    stronger; suggests the lack of air is so bad it is almost hard to breathe

  • close

    British, often paired with 'the air felt close'; warm and damp rather than only stale

  • muggy

    focuses on humid heat, can be used outdoors too, unlike airless

Antonyms
  • airy

    the natural opposite: open, with plenty of fresh air moving through

  • ventilated

    more technical; describes a space designed so that fresh air can circulate

  • breezy

    informal; suggests a pleasant flow of cool air

Usage Note

Almost always describes enclosed indoor spaces (rooms, offices, buildings, vehicles). Frequently paired with another negative adjective such as 'hot', 'stuffy', 'crowded', or 'dark' to build the picture of an uncomfortable place.

Common Mistakes

The garden was airless yesterday.
There was no breeze in the garden yesterday.
'airless' is used for enclosed indoor spaces, not for open outdoor places.
I felt airless after running.
I felt out of breath after running.
'airless' describes a place, not a person.

Word family

Synonym discussion

Sense: adjective/1

All four words describe an indoor space where the air does not feel fresh, but they differ in tone and strength. 'Stuffy' is the most everyday word and is the one most learners should reach for first; it is neutral and works in any register. 'Airless' is slightly more formal or literary, and it tends to appear in descriptive writing about a room that feels enclosed and lifeless. 'Stifling' is the strongest of the four — the heat or staleness is so heavy that breathing feels difficult, often combined with anger or panic. 'Close' is mostly British and suggests warm, slightly damp air, as in 'It feels very close in here — could you open a window?' Compare: 'a stuffy office' (mild complaint), 'an airless office' (a writer painting a scene), and 'a stifling office' (almost unbearable).

airless ↗stuffystiflingclose ↗

Common collocations

Nouns

Adverbs

  • completely airless
  • almost airless
  • horribly airless

Phrases

  • hot and airless
  • dark and airless
  • cramped and airless
  • stuffy and airless

Etymology

Old EnglishMiddle EnglishModern English

Formed in English by adding the suffix '-less' (meaning 'without') to the noun 'air'. The pattern follows other common '-less' adjectives such as 'hopeless', 'useless', and 'breathless'. Recorded in English from around the early 17th century, originally in the literal sense of 'lacking air', and from there extending to the modern everyday meaning of a room that feels stuffy and uncomfortable.