'coherent' originates from Latin, specifically the word 'cohaerentem,' where 'co-' meant 'together' and 'haerere' meant 'to stick.'

'cohaerentem' transformed into the French word 'cohérent,' and eventually became the modern English word 'coherent' through Middle English.

Initially, it meant 'sticking together,' but over time it evolved into its current meaning of 'logically connected and consistent.'