The Oxford Thesaurus An A-Z Dictionary of Synonyms - unconscionableadj.

1) conscienceless, unscrupulous, amoral, unprincipled, immoral, unethical, evil, criminal, unjust, wicked, arrant: This unconscionable thief stole from his own mother. 2) excessive, extortionate, egregious, extreme, unwarranted, unreasonable, outrageous, inordinate, immoderate, exorbitant, indefensible, unpardonable, inexcusable, unforgivable: When I questioned the unconscionable size of his bill, the plumber explained that he charges extra for house calls. UNCONSCIOUS adj. 1) insensible, out (cold) , knocked out, senseless, numb, stunned, comatose, dead to the world, Colloq blacked-out: The patient was unconscious for hours. 2) Often, unconscious of. heedless (of or to) , unheeding, unheedful (of) , insensitive (to) , mindless, unmindful (of) , reflex, automatic, involuntary, unintentional, instinctive, subliminal, unthinking, unpremeditated, subconscious, unwitting; blind (to) , unaware (of) , oblivious (to or of) , deaf (to) : For Tim, scratching his head is an unconscious act. Tim is totally unconscious of how irritating his mannerisms are.