complication

noun

1. (countable, uncountable)The act or process of complicating.
2. (countable, uncountable)The state of being complicated; intricate or confused relation of parts; complexity.
3. (countable, uncountable)A person who doesn't fit in with the main scheme of things; an interloper.
4. (countable, uncountable)A disease or diseases, or adventitious circumstances or conditions, coexistent with and modifying a primary disease, but not necessarily connected with it.
5. (countable, uncountable)A feature beyond basic time display in a timepiece.

   “Obsessed, he was after a watch that contained the greatest number of complications in the boldest combinations in the smallest space imaginable.”

   “In their final year, each student must make their own watch with a complication—from a tourbillon to a chiming mode to having a date display.”

6. (countable, obsolete, uncountable)A twisting or intertwining.

   “the snaky complication in the Caduceus or rod of Hermes.”