Letting go is a phrase used when someone releases or relinquishes control over something that they have been holding onto. However, there are several antonyms for letting go by, including clutch, hold on, grasp, retain, and cling. These words signify a lack of release or a refusal to let go of something, either physically or emotionally. They often relate to fear, anxiety, or possessiveness, and can result in negative outcomes such as stress, tension, and strained relationships. It is important to recognize when it is necessary to let go of something and to be open to change, growth, and new opportunities, rather than holding onto the past.