irretrievable

His death during the storm was recognized as an irretrievable loss of part of what made the neighborhood the neighborhood.

But she and her family have learned enough about irretrievable loss to keep a hard-earned perspective.

The leaders fallen, no further object for contention remained to the rebels, and the defeat was complete and irretrievable.

But, sir, it is not to lament the irretrievable that I intrude myself upon your leisure.