superficiality

This term describes a lack of depth, whether in a physical sense or a psychological one. When applied to a person's character, it carries a strong negative connotation, suggesting a preference for appearances over substance or an inability to engage with complex emotions and ideas. In medical or technical contexts, the word is neutral and descriptive, referring strictly to the location of an injury or feature on the outer layer of a surface. It is an uncountable noun and does not have a plural form.