When we describe something as heavy, it usually means that it weighs more than we expected or it's difficult to lift. There are many synonyms we can use instead of saying "is heavy." We can say it's weighty, burdensome, cumbersome, laborious, oppressive, ponderous, or cumbersome. Sometimes, we can use a metaphorical term to describe its heaviness. For example, we can say it's a heavy load on our shoulders or that the idea weighs heavily on our mind. By using different synonyms, we can add variety to our language and make our descriptions more vivid and precise.