adjective
being without excuse or justification
an inexcusable blunder
Synonyms: indefensible, inexpiable, unforgivable, unjustifiable, unpardonable, untenable
Related Word: blamable, blameworthy, censurable, criticizable; impermissible, unallowable, unpermissible; intolerable, reprehensible
Contrasted words: allowable, blameless, defensible, forgivable, justifiable, pardonable, venial
Antonyms: excusable