[1] The headword, in the genitive plural, is taken from Aristophanes, Birds 538. The Suda spells the form with iota; Aristophanes in our accepted text has epsilon iota.
[2] The gloss is from the scholia ad loc. The word is glossed in many other lexicographers, from Herodian on; many of them (including Herodian) gloss it as nekrimai=a, but only the scholiast alludes to anagrams. (For references see under Photius kappa561 Theodoridis.) The "rearrangement of letters" could be either of the word nekrimai=a or of some of the letters in qnhsimai/wn krew=n, "carcass meat", as the scholiast goes on with: "'like carrion': by anagram, instead of carcasses (nekrimai=a). 'like carcass meat (qnhsimai/wn krew=n), which lack more varied seasoning'." Tzetzes, Chiliades 8.174 proposes another derivation which is just as fanciful but not as strained: "kene/bria are properly killed animals, / useless for feeding, and not profitable. / [so called] because they are pointless [ke/na] for feeding [bora/n], and vain."