Subgenres are genres that are subdivided, and with each subdivision become more specific.
“Post Hardcore is a Subgenre of the Hardcore Punk Genre that also incorporates characteristics...Post Hardcore
“Synth Rock is a Subgenre of New Wave music. Its characteristics are intentionally artificial...Synth Rock
“Power Violence is a subgenre of Thrashcore, which is itself a fusion genre of Hardcore Punk and...Power Violence