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certain

See definition of certain on Dictionary.com
  • adj.confident
  • adj.undoubtable, valid
  • adj.fixed
  • adj.referring to a specifically known amount

synonyms for certain

  • convinced
  • positive
  • sure
  • assertive
  • assured
  • believing
  • calm
  • cocksure
  • questionless
  • sanguine
  • satisfied
  • secure
  • self-confident
  • unconcerned
  • undisturbed
  • undoubtful
  • undoubting
  • unperturbed
  • untroubled

antonyms for certain

MOST RELEVANT
  • doubtful
  • uncertain
  • unsure
  • doubting
  • dubious
  • faltering
  • hesitant
  • unconfident
  • undecided
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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What are other ways to say certain?

Certain, one of a handful of adjectives indicating full belief and trust that something is true, suggests that there are definite reasons that have freed one from doubt. Confident emphasizes the strength of the belief or the certainty of expectation felt. Positive implies emphatic certainty, which may even become overconfidence or dogmatism. Sure, the simplest and most general term, expresses mere absence of doubt. 

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How to use certain in a sentence

On certain of the stems the fertile cone appears and the spores are ripened about June, after which the process withers.
HOW TO KNOW THE FERNSS. LEONARD BASTIN
The possibilities of certain branches of teaching have been altogether revolutionized by the cinematograph.
THE SALVAGING OF CIVILISATIONH. G. (HERBERT GEORGE) WELLS
M'Bongo and his whole court are now clothed, I am happy to say, at least to a certain extent.
THE PIT TOWN CORONET, VOLUME I (OF 3)CHARLES JAMES WILLS
After a bit of waiting, Mac decided that the smoke was floating from a certain direction, and we began to edge carefully that way.
RAW GOLDBERTRAND W. SINCLAIR
He has secured the release of certain Spanish prisoners, and is building two ships.
THE PHILIPPINE ISLANDS, 1493-1898, VOLUME XX, 1621-1624VARIOUS
For instance, the Limestone Polypody is not happy unless there is a certain amount of lime present in the soil.
HOW TO KNOW THE FERNSS. LEONARD BASTIN
The fact that the day following the punishment parade was a Sunday brought about a certain relaxation from discipline.
THE RED YEARLOUIS TRACY
One thing was certain: Grandfather Mole could travel much faster through the water than he could underground.
THE TALE OF GRANDFATHER MOLEARTHUR SCOTT BAILEY
I asked him to tell me how he produced a certain effect he makes in his arrangement of the ballad in Wagner's Flying Dutchman.
MUSIC-STUDY IN GERMANYAMY FAY
But before he could even sow that year's crop, he would have to see a certain banker who lived in Nebraska.
THE HOMESTEADEROSCAR MICHEAUX
SYNONYM OF THE DAY
OCTOBER 26, 1985
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capacitor

WORDS RELATED TO CERTAIN

Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.