Noah Webster
Websters Dictionary 1828
This online edition has been carefully prepared in a special format. All words, definitions, and examples have been preserved, but the explanations of word origins have been left out to make the data easier to use in a digital format. We have also removed Webster's long technical introduction for the same reason.
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Inexcusable
INEXCU'SABLE, adjective s as z. [Latin inexcusabilis; in and excusabilis, excuso. See Excuse.] Not to be excused or justified; as inexcusable folly.
First Occurrence in the Bible(KJV): Romans 2:1