IPA: /ˌsuːpəˈmæsɪv/
KK: /ˈsuːpərˌmæsɪv/
Much larger than what is normal or typical, especially in size or mass.
The supermassive black hole at the center of the galaxy is millions of times heavier than the sun.
Supermassive → It is formed from "super-" (meaning above or beyond) and "massive" (from Latin "massa", meaning a lump or mass). The word "supermassive" describes something that is extremely large or beyond the usual mass, often used in the context of astronomical objects like black holes.
Think of something that is 'beyond' ('super-') a 'large mass' ('massive') — that's why supermassive refers to something extremely large.