complexcomplex

Complex is borrowed from French complexe, from Latin complexus, past participle of complector ‘to entwine’ (com- + plectō).

1. Latinc. 75 BCE–200 CEplectō¹‘to weave, braid’
2. Latinc. 75 BCE–200 CEcomplector¹‘to entwine, encircle’
3. Latinc. 75 BCE–200 CEcomplexus¹past participle of complector
4. Frenchc. 1600–presentcomplexe¹‘complex’
5. Englishearliest quotation 1689complex¹

1. ¹ Wiktionary, English complex
2. Earliest quotation in Wiktionary’s entry: 1689, London: […] Eliz[abeth] Holt: “Ideas thus made up of several simple ones put…”.