complexity

complex +‎ -ity Partially displaced native English manifoldness.

• IPA^(key): /kəmˈplɛk.sɪ.ti/

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complexity (countable and uncountable, plural complexities)

1. (uncountable) The state of being complex; intricacy; entanglement.
2. (countable) That which is and renders complex; intricacy; complication.
   • 1895 October, Stephen Crane, chapter VIII, in The Red Badge of Courage: An Episode of the American Civil War, New York, N.Y.: D[aniel] Appleton and Company, →OCLC, pages 84–85:

     The battle was like the grinding of an immense and terrible machine to him. Its complexities and powers, its grim processes, fascinated him.

• complicacy

• simplicity

• complexus
• complicate