unsustainable

Not sustainable.

Japanese Meaning

持続不可能

The company's unsustainable growth relied heavily on short-term loans and cost-cutting measures.

その会社の持続不可能な成長は短期融資とコスト削減策に大きく依存していた。

Sense（1）

Not sustainable.

You don't have to be Einstein to work out that this level of government subsidy is unsustainable.

more unsustainable

（ comparative ）

most unsustainable

（ superlative ）