IPA: /ˌsuːpərɪˈfɪʃənsi/
KK: /suːpərɪˈfɪʃənsi/
The quality of being extremely efficient, achieving maximum productivity with minimal wasted effort or resources.
The company's superefficiency allowed it to produce more goods while using less energy.
Superefficiency → It is formed from "super-" (meaning above or beyond) and "efficient" (from Latin "efficiens", meaning working out or accomplishing). The word "superefficiency" refers to a level of efficiency that exceeds normal expectations or standards.
Think of being "above" ('super-') normal levels of "working well" ('efficient') — that's why superefficiency means working exceptionally well.