Detaching weight from is the antonym for the phrase "attaching weight to". The word "detaching" means to remove or disconnect something, thus the phrase "detaching weight from" implies the removal of heaviness or pressure from a particular object. This antonym can be applied in different situations such as removing a physical weight from an object or removing the emotional burden from a person's mind. Other antonyms for "attaching weight to" could include reducing pressure, lightening the load, or alleviating strain. These opposites emphasize the idea of relieving tension, easing burdens, and promoting a sense of release and liberation.