Mizen-stay is a nautical term which refers to the lowermost, fore-and-aft, supporting rope or wire in a sailing ship's mizzen rigging. It is a crucial component that helps to keep the mizzen mast upright and stable. There are numerous synonyms for mizen-stay based on regional and linguistic variations. In a traditional British context, it is often referred to as the crossjack-stay. However, in the United States, it is referred to as the "mizzen backstay." Other synonyms for mizen-stay include mizzen shroud, taut-rope, forestay, and back-shroud. These terms are often used by sailing enthusiasts and maritime experts to describe the various components of a ship's rigging.