To deprive of glory; to make inglorious or discredit.
From en- + glory, but functioning like a negative (dis- or un-) verb. While the prefix normally means 'to put into a state,' here it creates the opposite effect through a pattern of semantic reversal or perhaps influenced by 'inglorious.'
Medieval and Renaissance writers were wild about 'en-' verbs, creating formations that didn't always follow logical patterns. 'Englory' is so rare it barely appears in historical texts, but it shows creative speakers trying to make English do what they needed it to do.
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