Lexical Definition

‎προαμαρτάνω‎ proamartánō (pro-am-ar-tan'-o) to sin beforehand ^G:V
from ‎πρό‎ and ‎ἁμαρτάνω‎

sin already, heretofore sin.

• to sin previously (to conversion)

Abbott-Smith

*† προ-αμαρτάνω,
to sin before: II Co 12:21 13:2.†

Abbott-Smith References

Liddell-Scott-Jones

προαμαρτάνω,

fail or sin before, [NT]: perfect participle passive, τὰ προημαρτημένα [Refs 2nd c.BC+]

_{LSJ Scripture Refs: 2Cor.12.21}