"Heavy" refers to an object or substance that has a significant weight or mass compared to its size. It is often used to describe items that are difficult to lift or carry, such as boulders, weights, or furniture. The concept of heaviness can also relate to the density of materials, where denser materials like lead feel heavier than less dense materials like wood. In physics, heaviness is associated with the force of gravity acting on an object's mass. This force is measured in units like newtons or pounds. Heaviness can impact various fields, including engineering, where understanding weight distribution is crucial for building structures, and transportation, where the weight of cargo affects vehicle performance.