The antonyms for the word "un-hitch" are "hitch" and "attach." When you hitch something, you are connecting it to another object, while when you un-hitch it, you are disconnecting the two objects. Hitching is commonly used when towing trailers or attaching cargo to vehicles. The opposite of un-hitching is attaching, which means to bring two objects together securely. For example, you may attach a trailer to a hitch on a truck before hauling it. Additionally, you can attach one object to another by tying, fastening, or connecting them together, whereas un-hitching involves the opposite actions of untying, unfastening or disconnecting.