Pronunciation: /ʌn.səˈsteɪ.nə.bəl/
adjective An adjective is a word that describes or modifies a noun or pronoun. In this case, 'unsustainable' describes something that cannot be maintained or continued at its current rate or level.
A1 Using single-use plastic bags is unsustainable for the environment.
A2 Eating fast food every day is unsustainable for your health.
B1 The company's current business model is unsustainable in the long run.
B2 The rapid deforestation of the Amazon rainforest is unsustainable and must be stopped.
C1 The government needs to implement policies to address unsustainable practices in the agriculture industry.
C2 The growing population and increasing consumption levels are leading to unsustainable levels of resource depletion.
formal The current rate of deforestation is unsustainable and will have long-term negative effects on the environment.
informal Spending more money than you earn is unsustainable in the long run.
slang Eating fast food every day is just not sustainable for your health.
figurative Ignoring the warning signs of climate change is like driving full speed towards an unsustainable future.
unsustained
unsustainables
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will be unsustainable
has been unsustainable
is being unsustainable
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to be unsustainable
unsustaining
unsustained