/ ˌkɒmplɪˈkeɪʃn; NAmE ˌkɑːm-/ noun
1.
[ C , U ] a thing that makes a situation more complicated or difficult :
The bad weather added a further complication to our journey.
2.
[ C , usually pl. ] ( medical ) a new problem or illness that makes treatment of a previous one more complicated or difficult :
She developed complications after the surgery.
••
WORD ORIGIN
late Middle English : from late Latin complicatio(n-) , from Latin complicare fold together, from com- together + plicare to fold.