INEXCUSABLE
inexcusable, unforgivable
(adjective) not excusable
inexcusable
(adjective) without excuse or justification
Source: WordNet® 3.1
Etymology
Adjective
inexcusable (comparative more inexcusable, superlative most inexcusable)
not excusable
Antonyms
• excusable
Source: Wiktionary
In`ex*cus"a*ble, a. Etym: [L. inexcusabilis: cf. F. inexcusable. See
Excuse.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition