This is the 836th most frequent Italian word.
complesso
The Italian word "complesso" can mean "complex" (adjective: complicated or intricate), "ensemble" (a group of musicians), or "compound" (a group of buildings or elements).
In this sentence, 'complesso' acts as an adjective describing the system, in the sense of being intricate or complicated.
Questo è un complesso sistema di regole.
This is a complex system of rules.
Here, 'complesso' is a noun referring to a group of interconnected archaeological sites.
Abbiamo visitato un complesso archeologico durante le vacanze.
We visited an archaeological complex during the holidays.
In this usage, 'complesso' operates as a noun within a psychological context, signifying a mental or emotional structure causing the feeling of inferiority.