Webster's Revised Unabridged Dictionary · 1913

Inexcusable

Inexcusable , adjective

[Latin inexcusabilis: compare French inexcusable. See Excuse.]

Not excusable; not admitting excuse or justification; as, inexcusable folly.
Therefore thou art inexcusable, O man, whosoever thou art that judgest; for wherein thou judgest another, thou condemnest thyself; for thou that judgest doest the same things. — Rom. ii. 1