insostenibile
unsustainable; unbearable
adjective een-sohs-teh-NEE-bee-leh Rare
Usage Note
Insostenibile covers two related senses: something ecologically or financially 'unsustainable' (un debito insostenibile, 'an unsustainable debt') and something emotionally 'unbearable' (un dolore insostenibile, 'unbearable pain'). Context always makes the sense clear. Do not confuse it with insopportabile, which leans more toward 'intolerable' in a personal-irritation sense.
Examples
"La situazione era diventata insostenibile."
Natural Translation
The situation had become unsustainable.

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