The prefix "retro-" means "posterior to, behind," or "back, backward, after." Words which begin with "retro" include: retrocurved (adj., curved backward), retrocognition(n., supernatural or extraordinary knowledge of the past), retroactive (adj., related to or applying to things of the past), retrograde (adj., inverse, moving backwards, or becoming worse), retro-date (v., to set something back to a prior date), retroform (v., to reshape into an earlier form), retrovision (n., a looking back to the past), and retrocede (v., to go back, or to give something back). For more "retro-" words, see the Oxford English Dictionary, s.v. "retro-, prefix."