unavoidable casualty

Noun unavoidable casualty has 1 sense

• unavoidable casualty(n = noun.event) act of god, force majeure, inevitable accident, vis major - a natural and unavoidable catastrophe that interrupts the expected course of events; "he discovered that his house was not insured against acts of God"
is a kind of calamity, cataclysm, catastrophe, disaster, tragedy