IPA: //suːˈpɜːrfluəs//
KK: /sʊˈpɜrfluəs/
Something that is more than what is needed or required; unnecessary or excessive.
The report included a lot of superfluous information that made it hard to understand the main points.
Superfluous → It is formed from "super-" (meaning above or over) and "fluere" (meaning to flow). The word describes something that flows over or beyond what is necessary, hence excessive or unnecessary.
Think of something that flows 'above' ('super-') what is needed ('fluere') — that's why superfluous means excessive or unnecessary.