Meaning of the word unsustainable in English

What does unsustainable mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

unsustainable

US /ˌʌn.səˈsteɪ.nə.bəl/
UK /ˌʌn.səˈsteɪ.nə.bəl/

Adjective

not able to be maintained at the current rate or level

Example:
The current rate of resource consumption is unsustainable.
Such a high level of debt is clearly unsustainable.