Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
superfluous (adj.)
means “not needed,” “more than enough,” and especially “extra” and “wasteful”: She wasted most of her time on superfluous details. Pronounce it soo-PUHR-floo-uhs, and note its semantic overlap with gratuitous and its differences from egregious (both of which see).
