Synonyms:
inexcusable
Meaning: without excuse or justification
Usage examples
'There are (said he) inexcusable lies, and consecrated lies.
Edison has been seen sometimes almost beside himself with anger at a stupid mistake or inexcusable oversight on the part of an assistant, his voice raised to a high pitch, sneeringly expressing his feelings of contempt for the offender; and yet when the culprit, like a bad school-boy, has left the room, Edison has immediately returned to his normal poise, and the incident is a thing of the past.