Some states use the terms irremediable breakdown, irretrievable breakdown, or incompatibility. The law provides for no-fault divorce based on the irretrievable breakdown of the marital relationship. The only ground for divorce is irretrievable breakdown of marriage, evidenced by a twelve-month separation. However, victory masked severe, ultimately irretrievable divisions over the slavery issue. The riots caused the irretrievable loss of heritage architecture. Steps innocently taken may, one by one, lead to the irretrievable impairment of substantial liberties. Soviet and Russian historiography often uses the term "irretrievable casualties". On steep terrains falling trees can slide downhill and become irretrievable. All of the treasure is now completely irretrievable. This is particularly valuable for irregular or irretrievable scanning movements. His house, Lochend, fell into a derelict condition and was almost irretrievable. The spirit and identity of place becomes irretrievable.