Unavoidable casualty is a term used to describe a situation that could not be prevented or anticipated. It is often used in legal and insurance contexts to refer to an event that was outside of anyone's control. Synonyms for unavoidable casualty include force majeure, act of God, unforeseeable event, and uncontrollable circumstance. These terms all describe a situation in which there was no reasonable way to prevent or anticipate the event in question. Whether it is a natural disaster, a sudden illness, or an act of violence, an unavoidable casualty is a devastating event that often requires significant resources and support to overcome.