In ancient rhetoric and medicine, a loss or failure of function, particularly concerning the loss of effective delivery or action in discourse or bodily processes.
From Greek 'apo-' (away, loss) + 'diabolosis' (a throwing across, reversal), a technical term found in classical medical and rhetorical texts describing dysfunction or failure.
This is an incredibly obscure term that shows up in classical medical texts—it describes when something that should work just... doesn't, whether that's a speech falling flat or a body part losing its ability to function.
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