The quality or state of being circular or circuitous; a circling or indirect route or manner.
From Latin 'circuitus' (a going around, circuit) + '-ity' (state or quality). An older English word than 'circuitousness,' from Middle English period.
Medieval scholars loved words ending in '-ity' because they sounded more learned—'circuity' is one of those Renaissance terms that means the same as 'circuitousness' but sounds more scholarly and formal!
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