(noun) a rhetorical or literary figure in which words, grammatical constructions, or concepts are repeated in reverse order, in the same or a modified form; e.g. ‘Poetry is the record of the best and happiest moments of the happiest and best minds.’.
the word 'inexorable' is itself inexorable [...] by the rainbow sweep of vowels which, in its cadence, describes an implacable curve--each syllable peels off irrevocably, culminating in the chiasmus of the 'X'
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