Antonyms for certain
ˈsɜr tncer·tain

WiktionaryRate these synonyms:2.3 / 3 votes

1. certainadjective

   Antonyms:
   uncertain

2. certainadjective

   Sure, positive, not doubting.

   Certain people are good at running.

   Antonyms:
   uncertain

English Synonyms and AntonymsRate these synonyms:2.0 / 1 vote

1. certain

   That is authentic which is true to the facts; that is genuine which is true to its own claims; as, authentic history; genuine money.

   A 'genuine' work is one written by the author whose name it bears; an 'authentic' work is one which relates truthfully the matters of which it treats. For example, the apocryphal Gospel of St. Thomas is neither 'genuine' nor 'authentic.' It is not 'genuine,' for St. Thomas did not write it; it is not 'authentic,' for its contents are mainly fables and lies.

   Trench On the Study of Words lect. vi, p. 189. [W. J. Widdleton]

   Authentic is, however, used by reputable writers as synonymous with genuine, tho usually where genuineness carries a certain authority. We speak of accepted conclusions, certain evidence, current money, genuine letters, a legitimate conclusion or legitimate authority, original manuscripts, real value, received interpretation, sure proof, a true statement, a trustworthy witness, a veritable discovery.

   Antonyms:
   apocryphal, baseless, counterfeit, disputed, exploded, fabulous, false, fictitious, spurious, unauthorized

   Synonyms:
   accepted, accredited, authentic, authoritative, authorized, current, genuine, legitimate, original, real, received, reliable, sure, true, trustworthy, veritable

Complete Dictionary of Synonyms and AntonymsRate these synonyms:0.0 / 0 votes

1. certain

   Antonyms:
   uncertain, dubious, exceptional, irregular, casual, occasional, questionable, doubtful, vacillating, undecided, uncertain

   Synonyms:
   true, fixed, regular, established, incontrovertible, undoubtful, indubitable, infallible, unmistakable, sure, unfailing, real, actual, undeniable, positive, convinced, assured

Princeton's WordNetRate these antonyms:2.0 / 2 votes

1. certain(a)adjective

   definite but not specified or identified

   "set aside a certain sum each week"; "to a certain degree"; "certain breeds do not make good pets"; "certain members have not paid their dues"; "a certain popular teacher"; "a certain Mrs. Jones"

   Antonyms:
   undependable, flukey, unreliable, contingent, iffy, chancy, uncertain, careless, up in the air, indefinite, fluky

2. certain(p), sureadjective

   having or feeling no doubt or uncertainty; confident and assured

   "felt certain of success"; "was sure (or certain) she had seen it"; "was very sure in his beliefs"; "sure of her friends"

   Antonyms:
   iffy, unreliable, chancy, undependable, flukey, careless, fluky, up in the air, uncertain, contingent, indefinite

3. certain(p)adjective

   established beyond doubt or question; definitely known

   "what is certain is that every effect must have a cause"; "it is certain that they were on the bus"; "his fate is certain"; "the date for the invasion is certain"

   Antonyms:
   undependable, indefinite, flukey, up in the air, chancy, uncertain, iffy, unreliable, fluky, careless, contingent

4. certain, sureadjective

   certain to occur; destined or inevitable

   "he was certain to fail"; "his fate is certain"; "In this life nothing is certain but death and taxes"- Benjamin Franklin; "he faced certain death"; "sudden but sure regret"; "he is sure to win"

   Antonyms:
   indefinite, fluky, contingent, flukey, undependable, iffy, unreliable, careless, chancy, uncertain, up in the air

   Synonyms:
   certain(p), sealed, certain(a), trusted, indisputable, sure

5. sealed, certainadjective

   established irrevocably

   "his fate is sealed"

   Antonyms:
   up in the air, indefinite, careless, unreliable, iffy, undependable, uncertain, flukey, chancy, fluky, contingent

   Synonyms:
   certain(p), sealed, sure, certain(a), plastered

6. certain, sureadjective

   reliable in operation or effect

   "a quick and certain remedy"; "a sure way to distinguish the two"; "wood dust is a sure sign of termites"

   Antonyms:
   chancy, unreliable, flukey, careless, iffy, up in the air, fluky, undependable, contingent, uncertain, indefinite

   Synonyms:
   certain(p), sealed, certain(a), trusted, indisputable, sure

7. certain, sureadjective

   exercising or taking care great enough to bring assurance

   "be certain to disconnect the iron when you are through"; "be sure to lock the doors"

   Antonyms:
   fluky, indefinite, chancy, iffy, undependable, careless, up in the air, unreliable, contingent, flukey, uncertain

   Synonyms:
   certain(p), sealed, certain(a), trusted, indisputable, sure

Synonyms, Antonyms & Associated WordsRate these synonyms:0.0 / 0 votes

1. certainadjective

   Antonyms:
   indefinite, uncertain, doubtful, uncertain

   Synonyms:
   assured, confident, convinced, satisfied, undoubting, undeniable, irrefutable, indubitable, incontrovertible, incontestable, sure, inevitable, unavoidable, unfailing, infallible, inerrable, fixed, stated, specified

Editors ContributionRate these antonyms:0.0 / 0 votes

1. doubtfully

   free from doubt or reservation; confident; sure.

   i am certain he will come.

   Submitted by JP03 on January 19, 2015  

How to use certain in a sentence?

1. Jay Clark on Wednesday:

   It’s not about Olivia or NIL or social media, it’s just I guess sort of the sense of entitlement that some people feel they can behave a certain way and that what we saw go on out there was a behavior that I didn’t think was appropriate, that’s not normal autograph seeking behavior, you know, engagement with an athlete with fans and that kind of stuff. There was a, there was a mob sense to that scene that that was very disconcerting to me and that’s what I hope is not going to become the norm.

2. Felix Pensulo Phiri:

   As a country, we are so worried about this problem, every year, there are certain districts that don't have enough food.

3. Brandon Bell/Getty Images:

   There are limits in terms of number of hours per year certain facilities can operate for environmental purposes, the Secretary of Energy or the EPA could waive some of those restrictions to allow for greater use of existing assets to meet these periods of shortfall. So, there is something right here you could do in summer of 2022 to help mitigate the situation a little, but there's a lot more investments [ that are ] going to have to [ be ] made in the long run.

4. James Reda:

   When all the numbers are crunched, 2022 is going to be a flat year for CEO pay, certain industries will continue to go up, certain other industries will take a beating. But I think overall you’ll see pretty flat numbers because it wasn’t a good year for bonuses.

5. Dana Sabraw:

   What I don't want to happen is to simply have a situation where the government is providing the information and the plaintiffs are doing all of the legwork, we're going to reach a certain point in time in the not-too-distant future where there's going to be a number of parents that are not located.

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