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unbreathable Synonyms

Another word for unbreathable

Choosing another word for unbreathable depends on context, so the synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Unfit or impossible to be breathed, especially due to pollution, smoke, toxicity, or a lack of oxygen.

Usage Example

"Thick smoke from the nearby wildfires made the outdoor air nearly irrespirable for several days."

Strongest
irrespirable
Strong
suffocating
stifling
choking
noxious
Weak
foul

• adjective (Context 2)

Not allowing air or moisture to pass through easily, causing heat and sweat to be trapped against the skin (of a fabric, garment, or material).

Usage Example

"The heavy, airtight synthetic uniform was deeply uncomfortable to wear during the humid summer shift."

Strong
airtight
nonporous
impermeable
Weak
stifling

Opposites of unbreathable

The opposite of unbreathable shifts depending on context. Common opposites include:

breathable
respirable
airy
porous
fresh
ventilated
pure
See all opposites of unbreathable

• Nearby Words

unbreachable
unbreached
unbreakable
unbreathable
unbridgeable
unbridged
unbridled

Cite this Entry

Wordmom. (2026). Synonyms for Unbreathable. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/unbreathable
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