IPA: //ˌmætrɪˈsaɪdəl//
KK: /mætɹɪˈsaɪdəl/
Describing something that is related to the act of killing one's mother.
The story explored the matricidal themes present in the character's troubled relationship with her mother.
Matricidal → It is formed from "mater" (meaning mother) and "-cide" (meaning to kill). The word "matricidal" refers to the act of killing one's mother.
Think of 'mother' ('mater') and 'to kill' ('-cide') — that's why matricidal means to kill one's mother.