The Oedipus complex is a psychoanalytic theory that describes a child's feelings of desire for their opposite-sex parent and rivalry with their same-sex parent.

She has always struggled with an inferiority complex.

The housing complex is located in a quiet neighborhood.

Vitamin-B complex is found in yeast and liver.

The military industrial complex is a term used to describe the close relationship between the military and defense industry, where military needs and corporate profits are intertwined.