ethically indefensible; immoral
After they fired on the rioters with rubber bullets, the police were criticized for an unconscionable use of force.
un (English)#con (with, thoroughly)#scire (to know) (Latin)
ignoble, odious, reprehensible, sordid, unconscionable
unconscionable is un + conscio + nable. and conscience means to know what is morally acceptable but unconscious means not aware of the acceptable amount and therefore the same as unconscionable.