"Floatless" refers to a state or condition where an object or substance does not experience buoyancy or floating. This can occur in various contexts, such as in physics, where an object is denser than the fluid it is placed in, causing it to sink instead of float. In the context of swimming, "floatless" can describe a swimmer's ability to maintain a position in the water without relying on flotation devices. This skill is essential for techniques like freestyle and butterfly, where body position and control are crucial for efficiency and speed.