Some gleanings and the shortest history of bummers
Every English dictionary with even minimal information on word origins, will tell us that lord and lady are so-called disguised compounds. Unlike skyline or doomsday (to give two random examples), lord and lady do not seem to consist of two parts. Yet a look at their oldest forms—namely, hlāf-weard and hlæf-dīge—dispels all doubts about their original status (the hyphens above are given only for convenience).