εἷς καθ’ εἷς (heîs kath’ heîs|hice kath hice|adverb|one|according to)
[Grk] εἷς καθ’ εἷς, εἷς, κατά
Derivation: from εἷς repeated with κατά inserted;
Strong's: severally
KJV: --one by one.
See: εἷς
See: κατά