Disconnected things are not linked in any way. sequences of utterly disconnected events = unconnected. disconnected thoughts or ideas do not seem to be related to each other = unrelated
{s} cut off, severed, detached; lacking organized continuousness; not plugged, not connected
lacking orderly continuity; "a confused set of instructions"; "a confused dream about the end of the world"; "disconnected fragments of a story"; "scattered thoughts"
having been divided; having the unity destroyed; "Congress gave the impression of a confusing sum of disconnected local forces"-Samuel Lubell; "a league of disunited nations"- E B White; "a fragmented coalition"; "a split group"
marked by or composed of disconnected parts or sounds; cut short crisply; "staccato applause"; "a staccato command"; "staccato notes"