The 'origin' of this custom/tradition is not known. = The 'origins' of this custom/tradition are not known. [=no one knows how this custom/tradition started]
He comes from 'humble origins'. [=he comes from a family that did not have high social status or much money]
The English word “rendezvous” is French 'in origin'. [=the English word comes from French]
(..) in your power to get her back." And we are. It wasn't a collective "you". It was a singular "you", ie me. Sir, we may have something. Jamie's been tracing the video's origin. I thought it was untraceable. Algorithm. Anyway, we also know it was uploaded at .am. I ran a nationwide traceback (..)2011 TvShow: Black Mirror Title: The National Anthem Season: 1 Episode 1