English
complexity
From complex + -ity.
Formed from complex + -ity
Latin plectō ‘to weave, braid’
Latin complector ‘to entwine, encircle’
Latin complexus
French complexe ‘complex’
English complex
The story
Partially displaced native English manifoldness.
Today it means
noun The state of being complex; intricacy; entanglement.
Language periods are conventional ranges, not dates for this word.
Etymograph / complexity