PROBLEM

I. noun see: pro- Date: 14th century 1. a question raised for inquiry, consideration, or solution, a proposition in mathematics or physics stating something to be done, 2. an intricate unsettled question, a source of perplexity, distress, or vexation, difficulty in understanding or accepting , see: mystery II. adjective Date: 1894 dealing with a ~ of conduct or social relationship , difficult to deal with