'complex' originates from Latin, specifically the word 'complexus,' where 'com-' meant 'together' and 'plectere' meant 'to weave.'

'complexus' transformed into the French word 'complexe,' and eventually became the modern English word 'complex' through Middle English.

Initially, it meant 'to weave together,' but over time it evolved into its current meaning of 'consisting of many different and connected parts.'