The term 'Unexpected Hazard' can be summarized as a 'PITFALL', which is a seven-letter word. A PITFALL is an unforeseen or unanticipated danger or difficulty that can lead to a setback or failure. It is often used to describe a situation in which someone has been tricked or taken advantage of, or has made a mistake that has caused them harm. Pitfalls can also refer to hidden dangers or risks that are not immediately obvious.