The phrase "caught hold of" refers to gripping, grasping, or clutching an object or someone tightly with one's hands. Antonyms for this phrase include releasing, letting go, dropping, or relinquishing. When someone "catches hold of" an object or person, they are steadfastly holding onto them, but by using antonyms, we can denote the opposite of this action. For instance, to "let go" of someone is to relinquish the tight grip one has on them. Similarly, "dropping" an object is the opposite of "catching hold of" it, as it indicates that one has released the object from their grasp.