un·us·a·ble
adjective/ˌʌnˈjuːzəbl/
/ˌʌnˈjuːzəbl/
- in such a bad condition or of such low quality that it cannot be used
（破得或差得）不能使用的；破烂不堪的 - The damage rendered the building unusable.
这次破坏使得这栋建筑已无法使用。 - The water in the wells has become unusable.
井里的水已经无法使用。
- The damage rendered the building unusable.