IPA: /ˌsuːpərəˈdɪʃən/
KK: /suːpərədɪʃən/
An addition that is made on top of something else, often referring to an extra element or feature that enhances or increases the original.
The architect proposed a superaddition to the existing building to create more space.
Superaddition → It is formed from "super-" (meaning above or beyond) and "additio" (from Latin, meaning addition). The word refers to the act of adding something additional or beyond what is already present.
Think of adding something 'above' ('super-') what is already there ('additio') — that's why superaddition means adding something extra.