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"full of reproach, intended to bring disgrace," late 14c., from Old French oprobrieus (Modern French opprobrieux), or directly from Late Latin opprobriosus, from Latin opprobare "to reproach, taunt," from ob "against" (see ob-) + probrum "reproach, infamy." Etymological sense is "disgrace attached to conduct considered shameful." Related: Opprobriously; opprobriousness.