What is the best description for the word "complication"?

Question

Quizplus · Accepted Answer

"A state of being confusing" is similar to complicated, but "an undesired development that makes something worse" is still a more precise definition. "A state of being confusing"  is the best description for the word complexity.
"A simple state or quality" is the best description for the word simplicity.
"A connection or interdependence between two or more things" is the best description for the word correlation. In other words, it's how one thing, when changes, affects another thing.

What Is the Best Description for the Word "Complication