Single-phasing is a term used in the electrical industry to describe a situation where one of the three phases of a three-phase power supply is lost. This can cause equipment to malfunction and can be a safety hazard for workers. Some synonyms for single-phasing include phase loss, single-phase supply, and phase failure. Other terms that may be used to describe similar situations include voltage drop, power outage, and circuit interruption. It is important for electricians and other professionals in the industry to understand these terms and be able to troubleshoot and rectify single-phasing situations to ensure the safety and functionality of electrical systems.