An alternative form of epidictic; relating to ceremonial or demonstrative speech intended to display rather than persuade.
From epidictic + '-al' (adjective suffix), creating a variant form used in older English texts and classical rhetoric discussions.
Language evolves, and 'epidictical' is the older, fancier cousin of 'epidictic'—both mean the same thing, but epidictical sounds like it walked straight out of a 1700s library!
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