Incapable of being justified or explained
English: indefensible, insupportable, unjustifiable, unwarrantable, unwarranted
indefensibleEnglish
indefensible, insupportable, unjustifiable, untenable, unwarrantable
Adjective
(of theories etc) incapable of being defended or justified
English: indefensible, untenable
Not able to be protected against attack
English: indefensible