fixed idea (noun) complex: psychological problem
Detalii: something complex may be well-organized and logically constructed as well as subtle and intricate, while a thing that is complicated will have something irregular, perverse, asymmetrical in addition to fundamental intricacy; complex is more formal and technical (a problem in mathematics is complex) while something like personal life can be complicated
Sinonime: hocus-pocus, incantation,
invocation, mumbo jumbo, open sesame, spell