IPA: //ˈsuːpərˌhiːtə//
KK: /ˈsuːpərˌhiːtər/
A part of a boiler that heats steam to a higher temperature than its boiling point, which helps to improve efficiency and prevents the steam from turning back into water.
The engineer explained how the superheater increases the efficiency of the steam engine.
Superheater → It is formed from "super-" (meaning above or beyond) and "heater" (from Old English "hætere", meaning one who heats). The word "superheater" refers to a device that heats something beyond the normal temperature.
Think of something that heats 'beyond' ('super-') the usual level — that's what a superheater does.