Unsustainable in a Sentence 

Definition of Unsustainable  

not able to be maintained for long periods of time

Examples of Unsustainable in a sentence

Although Tremaine is able to work 16 hour days right now, this kind of work schedule is unsustainable for long-term.  
The couple hoped that their marriage was unsustainable, but quickly realized that their union was unsustainable.  
Because the mortgage payment was now unsustainable the jobless man was forced to file for bankruptcy.  

Other words in the Weak category:

Most Searched Words (with Video)