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Definition of unsustainability
unsustainability
/ˌʌnsəˌsteɪnəˈbɪlɪti/
un · sus · tain · a · bil · i · ty
Adverb:unsustainably
•Plural:unsustainabilities
•Adjective:unsustainable
unsustainability Lexical Profile
CEFR
C1
Grade
11
Tier
2
Usage
Rare
Syllables
7
• noun
1
The quality or state of not being able to be maintained at the current rate or level over the long term, especially due to the depletion of natural, economic, or human resources.
Example
"The report highlighted the long-term unsustainability of relying exclusively on fossil fuels for global energy production."
2
The state of being unable to be defended, justified, or upheld against criticism or logical scrutiny.
Example
"The legal team quickly pointed out the unsustainability of the witness's contradictory testimony."
• Rhymes for unsustainability
• Nearby Words
Cite this Entry
Wordmom. (2026). Definition of Unsustainability. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/unsustainability