KJV Dictionary Definition: inexcusable
INEXCU'SABLE, a. s as z. L. inexcusabilis; in and excusabilis, excuso. See Excuse. Not to be excused or justified; as inexcusable folly.
INEXCU'SABLENESS, n. The quality of not admitting of excuse or justification; enormity beyond forgiveness or palliation.
This inexcusableness is stated on the supposition that they knew God, but did not glorify him.
INEXCU'SABLY, adv. With a degree of guilt or folly beyond excuse or justification.