Carrying a lot of weight can refer to physical weight or emotional burden. Antonyms for this phrase can include lightweight, unencumbered, burden-free, light-hearted, carefree, and unburdened. These words signify the opposite meaning of carrying a lot of weight, indicating something that is less heavy, less cumbersome, or less serious. A lightweight object or task is easy to carry and doesn't require much effort. Similarly, someone who is unencumbered or unburdened is free from worries, stress, or responsibility. Being carefree or light-hearted suggests a lack of serious concerns, indicating a relaxed and stress-free attitude.