IPA: /ˈsuːpəˌskrɪpt/
KK: /ˈsuːpərskrɪpt/
A character or symbol that is written above and to the side of another character, often used in mathematical or scientific notation.
In the equation, the 2 is a superscript indicating that it is squared.
Superscript → It is formed from "super-" (meaning above) and "script" (from Latin "scribere", meaning to write). The word "superscript" refers to characters written above the normal line of text.
Think of something that is 'above' ('super-') the regular writing ('script') — that's why superscript means writing that appears above the line.