Incapable of being justified or explained
English: indefensible, insupportable, unjustifiable, unwarrantable, unwarranted
unwarrantedEnglish
unwarranted, baseless, groundless, idle, indefensible
Adjective
Lacking justification or authorization
English: undue, unjustified, unwarranted
Without a basis in reason or fact
English: baseless, groundless, idle, unfounded, unwarranted, wild