noun
1. : a chain of circumstances constituting a situation in which the process of solving one difficulty creates a new problem involving increased difficulty in the original situation
2. : an argument or definition that is valueless because it either overtly or covertly assumes as true or as understood something which is to be proved or defined
3. : a chain of abnormal processes in which a primary disorder leads to a second which in turn aggravates the first one
the vicious circle of fatigue-anxiety-fatigue