Definition
From Mounce's Concise Greek-English Dictionary
Strong's Definition
not to know (through lack of information or intelligence); by implication, to ignore (through disinclination)
Mounce Concise Greek-English Dictionary
to be ignorant; not to understand; sin through ignorance
Translated in KJV as
(be) ignorant(-ly)not knownot understandunknown
Etymology
Verse by verse
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