complex

As an adjective, it suggests a structural intricacy where parts are interwoven. It differs from "complicated" in that something complex may be naturally sophisticated (like a biological system), whereas "complicated" often implies a frustrating or unnecessary level of difficulty. In the architectural sense, it describes a unified whole made of several distinct units. The feeling is one of scale and organization, typically used for residential or commercial zones. In psychological terms, it carries a heavy, often negative connotation of an obsession or a mental knot. It describes a subconscious driver that colors a person's entire worldview, usually linked to feelings of inadequacy or superiority.