'devious' originates from Latin, specifically the word 'deviare,' where 'de-' meant 'off' and 'via' meant 'way.'

'deviare' transformed into the French word 'dévier,' and eventually became the modern English word 'devious' through Middle English.

Initially, it meant 'off the main path,' but over time it evolved into its current meaning of 'not straightforward or deceitful.'