I honestly can't think of a word for this. The Cambridge British English dictionary doesn't have it listed as a word, other dictionaries online sometimes have it but don't list synonyms for it. I've tried prefixing un to the synonyms of criticise, but I end up with similar neologisms like unchallengeable.

As I think uncriticisable is a bit ugly (and therefore a self referential oxymoron:) would anyone know of there a prettier synonym I can use that is…?

a) in a major British dictionary
b) doesn't need a negation prefixed like un or non etc

It would be used in the following sentence:

…including those that support and propogate an unreformed, uncriticisable doctrine.


Here are the primary sources I used:

  1. I used the OSX dictionary and thesaurus. Since it is set to use British English, uncriticisable does not have an entry and unchallengeable has an entry in the dictionary but not in the thesaurus.
  2. I used the Cambridge British English dictionary and thesaurus. Uncritisable is not found. Uncritiseable is also not found. Unchallengeable is not found. Therefore I wasn't going to get any suggestions.
  3. I also tried uncriticizable but that redirects to criticize and you'll note that no antonyms are listed.

closed as off-topic by Edwin Ashworth, TimLymington, tchrist, user140086, Nathaniel Dec 30 '15 at 0:19

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  • Google Ngrams have instances of 'unchallengeable' dating back to 1800. – Edwin Ashworth Dec 28 '15 at 23:39
  • I am voting to leave this question closed as it is for general reference. Also, below answers have enough words. – user140086 Dec 30 '15 at 9:44
  • @Rathony it fits "Word choice and usage", from the help centre. – user43453 Dec 30 '15 at 9:58
  • In order for your question to be on-topic for word choice and usage, you need to include full context with an example sentence. The following is the rule of this community. Questions on choosing an ideal word or phrase must include information on how it will be used in order to be answered. For help writing a good word or phrase request, see: About single word requests. Please edit your question accordingly. – user140086 Dec 30 '15 at 10:00
  • 1
    If 'irrefutable' (which is the choice I'd make) is what you have chosen, perhaps you aren't aware that ir- is another prefix indicating negation. Just like un- and non-. – Edwin Ashworth Dec 30 '15 at 15:14


absolute, accomplished, certain, commanding, constant, deep-seated, dictatorial, entailed, esoteric, final, firm, fixed, hallowed, holy, immanent, immutable, imperious, implanted, implicit, imprescriptible, inalienable, inarguable, incontestable, incontrovertible, indefeasible, indestructible, indisputable, indubitable, indwelling, infixed, ingrained, inherent, inner, internal, intransferable, intrinsic, invariable, inviolable, inward, inwrought, irreducible, irrefragable, irrefutable, irreversible, non-negotiable, noncontroversial, peremptory, permanent, positive, private, resident, rigid, sacred, sacrosanct, secret, subjective, sure, total, tough, unalienable, unanswerable, unarguable, unassailable, unbreakable, unchanging, unconditional, unconsignable, uncontroversial, undeniable, unnegotiable, untransferable, unvarying.

I kind of like sacrosanct.

  • Thank you, my brain got stuck and you unstuck it :) I also think sacrosanct is the perfect word for this. – user43453 Dec 28 '15 at 22:45
  • 2
    @iain - A thesaurus is a wonderful thing. – Hot Licks Dec 28 '15 at 22:47
  • Many of these include prefixes. And this is genref. – Edwin Ashworth Dec 28 '15 at 23:37

Here's one not listed in HotLicks post:


iˈmakyələt/ adjective

  1. perfectly clean, neat, or tidy. "an immaculate white suit" synonyms: clean, spotless, ultraclean, pristine, unsoiled, unstained, unsullied;

  2. free from flaws or mistakes; perfect. "an immaculate safety record" synonyms: unblemished, spotless, impeccable, unsullied, undefiled, untarnished, stainless; More THEOLOGY (in the Roman Catholic Church) free from sin.


From @HotLicks extensive list, consider the 2 synonyms irrefragable and irrefutable.

  • "irrefragable" definition: impossible to dispute or to contest, e.g. irrefragable arguments

  • "irrefutable" definition: that cannot be denied, controverted or disproved, e.g. irrefutable logic.

  • Both have the prefix ir-. – Edwin Ashworth Dec 30 '15 at 15:11
  • Looking at the definitions, almost all words have a "negative" component: [im]possible, [dis]pute, de[ny], [contro]verted, [dis]proved ! – Graffito Dec 30 '15 at 18:03
  • Which makes them inappropriate answers here. – Edwin Ashworth Dec 30 '15 at 23:08