εἷς καθ’ εἷς G1527
heîs kath’ heîs · hice kath hice · None
from εἷς repeated with κατά inserted; severally:--one by one.
1 Occurrence in the King James Bible
John 8:9And they which heard it, being convicted by their own conscience, went out one by one, beginning at the eldest, even unto the last: and Jesus was left alone, and the woman standing in the midst.