adj. 25B6; adjective INDEFENSIBLE, unjustifiable, unwarranted, unpardonable, unforgivable; blameworthy, censurable, reprehensible, deplorable, unconscionable, unacceptable, unreasonable; uncalled-for, unprovoked, gratuitous.
INEXCUSABLE
Meaning of INEXCUSABLE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012