redundant

英 [rɪ'dʌnd(ə)nt] 美[rɪ'dʌndənt]

1. more than is needed, desired, or required;: "trying to lose excess weight"; "found some extra change lying on the dresser"; "yet another book on heraldry might be thought redundant"; "skills made redundant by technological advance"; "sleeping in the spare room"; "supernumerary ornamentation"; "it was supererogatory of her to gloat"; "delete superfluous (or unnecessary) words"; "extra ribs as well as other supernumerary internal parts"; "surplus cheese distributed to the needy"

2. use of more words than required to express an idea;: "a wordy gossipy account of a simple incident"; "a redundant text crammed with amplifications of the obvious"

3. repetition of same sense in different words;: "`a true fact' and `a free gift' are pleonastic expressions"; "the phrase `a beginner who has just started' is tautological"; "at the risk of being redundant I return to my original proposition"- J.B.Conant

1. Changes in technology may mean that once-valued skills are now redundant.: 技术上的革新可能意味着曾经被重视的技术现在已变得多余。