obsolete French obcecation, from Middle French, from Late Latin obcaecation-, obcaecatio, occaecation-, occaecatio act of hiding, from Latin obcaecatus, occaecatus (past participle of obcaecare, occaecare to blind, from ob-, oc- toward, against, over + caecare to blind, from caecus blind) + -ion-, -io -ion