emotional result we call happiness, most of us tend to engage in behaviour that is the exact opposite and then feel awful and inadequate with the inevitable result.
A subcategory within a particular genre: The academic mystery is a subgenre of the mystery novel. subcategory within a particular genre: The academic mystery is a subgenre of the mystery novel.
In the relationship between two objects, a subclass is the name given to the class that is inheriting from the superclass. Although it sounds a little more drab, remember that it's a more specialized version of the superclass. In the previous example, Student and Worker are the subclasses.