"an ineffectual ruler"; "like an unable phoenix in hot ashes"
"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"
"otiose lines in a play"; "advice is wasted words"; "a pointless remark"; "a life essentially purposeless"; "senseless violence"