Antonyms for the phrase "be at disposal" refers to when something is unavailable or inaccessible. It denotes a situation where something cannot be accessed or used for any reason. The opposite of being at disposal could be being unavailable, out of reach, occupied, in use or restricted. When something is unavailable, it implies that it is not within reach, and therefore, cannot be accessed or utilized. Being occupied suggests that something is currently in use and cannot be used by somebody else. Conversely, when something is available or at disposal, it denotes that it is accessible and ready for use by anybody.